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Batman: Arkham Knight: Batman: Arkham Knight 100% Completion Guide

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Founders' Island: the Riddler sweep

The last Riddler Trial at the orphanage, the first full Riddler sweep of Founders' Island, on foot through Port Adams and then by Batmobile, the report at the Clock Tower, and Season of Infamy's last mission.

The bridges are down, the militia is off the streets of Founders' Island, and the story can wait. You now carry the Remote Hacking Device, Disruptor, Remote Electrical Charge, Freeze Blast, Line Launcher and Grapnel Boost Mk IV, with the Power Winch and Forensics Scanner on the Batmobile. This stretch closes the Riddler Trials, then takes everything Founders' Island offers without new gear, and interrogating its Riddler Informants as you go marks these spots on your map. If Trial 09 would not open, begin at Port Adams and come back to it and the Final Exam once the sweep is done. Left for later: the two trophies your map shows that need the Voice Synthesizer, and the shields inside Port Adams, which wait until the Batmobile can get in.

Riddle: Riddler's helmet device in the Final Exam roomCollectible
Location
Miagani Island · Pinkney Orphanage – Return to Pinkney Orphanage in Bristol and take the green door off the main hall that the last trial unlocked; the game flags this riddle once you are in. In the next room, with the huge floor board, a Riddler console sits on a bookshelf off to the left. Hack it with the Remote Hacking Device, password MASTERPLAN, and when the shelf moves, go in and scan the dynamite-wrapped helmet on the table. If that won't register, try the plans on the same desk.
Requires
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler Trial 10: Final ExamHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Miagani Island · Pinkney Orphanage – Stay in the board room. Batman is shut out of the board, so switch to Catwoman and crawl along the ceiling grates to reach it. Batman moves the tiles from outside by firing the Remote Electrical Charge at the generators along two edges, one fire mode pulling a row and the other pushing it, and any tile Catwoman stands on stays put. Shift the tiles until each red laser fires into a hole in the floor: one laser on the first board, two on each of the others. After each board, get Catwoman back on the ceiling before the spinning blades start. Then go back to the previous room for the last key.
Requires
Summary
The last Riddler Trial: three floor-board puzzles solved as a pair. Its key earns Nine Lives.
Trophies
  • Achievement · SteamNine Lives
  • Achievement · XboxNine Lives
  • Bronze · PlayStationNine Lives
Sources
Report an issue
Riddler's Revenge: first fight with the RiddlerHidden spoiler – activate to revealQuest stepMinor spoiler
Location
Miagani Island · Pinkney Orphanage – Head back through the main hall as if to go: he arrives in a mech with a crowd of robots. Leave him alone and destroy the robots, Batman on the blue ones and Catwoman on the red. He can swap their colours, so keep switching, and dodge his green laser. Once they are gone, stay away from him, because the floor around him turns electric, and wait for him to sink below the floor.
Requires
Summary
The Riddler comes for you in his machine, but this round cannot be won. He retreats until all 243 challenges are done, so the fight is finished later.
Sources
Report an issue

Port Adams comes next, on foot: its gates stay shut to the Batmobile for now. The first trophy here has its switch in Bristol, close to the orphanage, so start it on your way out.

Riddler trophy: Port Adams timed runCollectible
Location
Founders' Island · Port Adams – Before you leave Bristol, climb to the top of the metal tower at the Botanical Gardens (3258, 2136) and stand on the red and black pressure plate for a few seconds. That gives you 40 seconds to reach the cage at (3008, 1172), low on a container in the stacks at Port Adams, so set a waypoint first. Chain Grapnel Boosts off the highest roofs, keep the Batclaw ready, and pull the trophy out from range. If no timer starts, or it runs out, carry on with the next three items, read the cage, and come back for another go.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddle: Bane's suit in a Port Adams containerCollectible
Location
Founders' Island · Port Adams – The next stacks along, in the north-west of the port at (2919, 1227), are built from green Sionis Industries and blue Santa Prisca containers. Climb them to the blue one near the top that stands half open and go inside. Batclaw the red handle on the wooden crate at the back and scan the suit it reveals.
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler trophy: Port Adams crane platformCollectible
Location
Founders' Island · Port Adams – Cross the port to the crane with the neon City Vision Construction sign (3289, 1476). Glide over and drop below it to the platform above the water, where the trophy sits in the open.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: Port Adams gate officeCollectible
Location
Founders' Island · Port Adams – Head back along the port to its locked gates. Between them and a crane (2963, 1493) stands a small office: walk in and take the trophy.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: ruined cathedral towerCollectible
Location
Founders' Island · Otisburg – Leave Port Adams for Otisburg and the large ruined cathedral under repair (2849, 1711). The trophy is inside the broken walls near the top of one tower, right beside the scaffolding.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Breakable: militia shield, statue courtyardCollectible
Location
Founders' Island · Otisburg – Look down from the cathedral to the courtyard with a statue in its middle (2797, 1640). Summon the Batmobile and shoot the shield on the south side of the building overlooking it.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Breakable: militia shield, grey building by the fire stationCollectible
Location
Founders' Island · Otisburg – Drive to the Otisburg Fire Station. The shield is on the tall, run-down grey building across the street (2586, 1477), next to Goth Corp.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Riddle: Goth Corp logo on its skyscraperCollectible
Location
Founders' Island · Otisburg – From that shield, look across at the big Goth Corp building (2585, 1567) and scan the logo on its side.
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler trophy: Bank of Gotham side weak wallCollectible
Location
Founders' Island · Otisburg – Grapnel round behind Goth Corp to the rooftop at (2609, 1597), on the Bank of Gotham block, and pick out the weak wall in Detective Mode. It is too high for Explosive Gel, so drive up to the overpass to the north-east, by the Bank of Gotham, shoot it from there, then climb in through the hole.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Dirty Tricks: three minutes of Batmobile driftingAchievement
Location
Founders' Island · Otisburg – That overpass is as good a road as any. Get the car moving first, then hold R2 and Square (RT and X on Xbox) to drift in a circle: a drift begun from a standstill zooms the camera in and does not count. You can also build the total as you drive and tick this when the trophy arrives.
Requires
Summary
A trophy for three minutes of drifting in total, added up across the whole run.
Trophies
  • Achievement · SteamDirty Tricks
  • Achievement · XboxDirty Tricks
  • Bronze · PlayStationDirty Tricks
Sources
Report an issue
Riddler trophy: weak wall in the bridge structureCollectible
Location
Founders' Island · Otisburg – Drive to the crane at (2788, 1828), over the bridge-like walkway near the Bank of Gotham. Detective Mode shows a weak wall on the structure's west side: shoot it from the street to the south, or glide into it, then climb through the hole.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: generator ball mazeCollectible
Location
Founders' Island · Otisburg – On the building beside the Penitence Bridge exit ramp (2747, 1881), a ball holding the trophy sits in a wall maze, with winch-driven generators along the top and on the right. Winch the top one fully left and the right one fully up, hit both with an attract charge, and drag the top one right while the pull lasts. With the top one at the far right, charge the right generator, then the top, to lift the ball through the small gap. At the bottom, park the top generator over the ball, attract with it and repel with the right one to send the ball to the exit at the bottom left.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: wharf under Penitence BridgeCollectible
Location
Founders' Island · Otisburg – Go to the Founders' end of Penitence Bridge (2808, 1966) and drop to the small wharf just above the water. The trophy is on it.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Breakable: militia shield, under the highwayCollectible
Location
Founders' Island · Drescher – Drive to the underpass at (2563, 1952) and take it briefly through Drescher to get beneath the highway. The shield is on the wall under the ramp to the upper streets.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Riddler trophy: monorail support timed runCollectible
Location
Founders' Island · Otisburg – Find the broken monorail support beside the neon purple skyscraper (2563, 1816), across from Divinity Church. The numbers by its cage, 2456, 2663, mark a junction box on the southern wall of the GCPD on Bleake Island, so drive there and winch it to start a 40-second timer. Unhook, race down the waterfront for the Lady of Gotham, eject at the corner, and chain Grapnel Boosts off the statue and a crane back to the cage.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Breakable: militia shield, under the walkwaysCollectible
Location
Founders' Island · Drescher – From the cage, drive past the neon purple building into Drescher and look under the walkways at (2493, 1789). If no shield is there, it may be under the walkway over the road at (2607, 1595), by the Bank of Gotham.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Riddle: Saint Dumas plaque at Divinity ChurchCollectible
Location
Founders' Island · Drescher – Go into the grounds of Divinity Church (2420, 1912) and round its west wall to the spot-lit plaque reading Saint Dumas. Scan it.
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler trophy: turret room by Perdition BridgeCollectible
Location
Founders' Island · Drescher – Drop to the waterside under Perdition Bridge (2198, 1950) and fire the Remote Electrical Charge at the generator above the shutter. Inside, hit the question mark next to you to shut the two turrets away, and take the trophy from the next room. Three gun robots then block the way out: steer a Remote Controlled Batarang onto the question mark so the turrets destroy them, hit it again to seal the turrets, and charge the shutter to leave.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: three lights on the cornerCollectible
Location
Founders' Island · Drescher – Climb back to the street and cross from the Perdition Bridge on-ramp to the run-down building at (2178, 1841), with an anchor and a cage on its corner walls. Winch the anchor out with the Batmobile to expose three question-mark lights, hit them all fast with quick-fire Batarangs, and take the trophy with the Batclaw.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddle: Grundy poster and phonograph behind the blue doorCollectible
Location
Founders' Island · Drescher – Walk round behind that building into the alley and climb the iron fence at (2220, 1819). Go through the blue door with a light over it and get the Solomon Grundy wanted poster and the phonograph in one frame to scan them.
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler trophy: short roof by the shrine alleyCollectible
Location
Founders' Island · Drescher – Come back out and stand on the iron fence. Straight across at (2251, 1815) is a short roof with a faint green glow, by a burning barrel and a mattress: cross to it and take the trophy.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Breakable: militia shield, City Vision buildingCollectible
Location
Founders' Island · Ryker Heights – Drive up to the upper streets of Ryker Heights and round to the east wall of the City Vision Construction building (2054, 1751). Shoot the shield there.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Riddler trophy: Cia Bella ruinCollectible
Location
Founders' Island · Ryker Heights – Drop back into the undercity and make for the ruined Cia Bella Restaurant (1956, 1789), just above the slum by the water. The trophy is on its exposed second floor.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: Trade House boardsCollectible
Location
Founders' Island · Ryker Heights – Follow the undercity street to the Trade House (1903, 1695) and grapnel up to it. High on the archway wall facing the lighthouse is a patch of wood panelling: get above it, glide off, turn back and smash through to the trophy behind.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: lighthouse balconyCollectible
Location
Founders' Island · Ryker Heights – From the Trade House, grapnel across to the upper circular balcony of the lighthouse (1760, 1676). The trophy is out in the open.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddle: three posed bodies on the waterfrontCollectible
Location
Founders' Island · Ryker Heights – Follow the waterfront from the lighthouse docks to (1919, 1560), under the airships. Three dead men are arranged there as if fishing: scan them.
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler trophy: boards under the craneCollectible
Location
Founders' Island · Ryker Heights – Carry on through the undercity below Airship Beta to the crane at (1963, 1477), opposite the Fish Market. Boards cover a gap in the wall over the water beneath it: get onto the roof over them, glide off, turn back and fly through.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: Killinger's timed runCollectible
Location
Founders' Island · Ryker Heights – Drive to Killinger's Department Store in the undercity (2155, 1678) and grapnel onto the overhang above its door, where the cage shows 2147, 1492: a plate between two statues on the link joining the Logerqist Towers. Leave the Batmobile below the towers, grapnel up and stand on the plate. The timer gives you 30 seconds, so drop straight off the roof into the car, drive back and grapnel to the overhang; a dive on foot also works.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddle: October calendar above the half-built tunnelCollectible
Location
Founders' Island · Ryker Heights – Carry on through the undercity from Killinger's to the tunnel with half-finished walls at (2249, 1507). Walk in to the two spotlights in its middle, look straight up, and grapnel through the gap in the ceiling. Scan the October calendar in the small room above.
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs.
Sources
Report an issue
Riddler trophy: Fishmonger sonar trailCollectible
Location
Founders' Island · Ryker Heights – Keep going through the tunnel to its far end (2214, 1467), where a green generator is fixed to the bay doors of The Grinning Fishmonger. From the Batmobile, pulse the Forensics Scanner and follow the painted question marks back through the tunnel to a ceiling fan. Stay in scanner mode, as dropping it may restart the trail, get up to the road and find the matching manhole, where the marks carry on to Bruford Tower. Shoot the green target at its base and go in for the trophy.
Requires
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Riddler trophy: under the construction bridgeCollectible
Location
Founders' Island · Ryker Heights – You are already on the surface: drive to the part-lifted construction bridge at (2319, 1667), the ramp you jumped in the launcher mission. Drop into the ditch beneath it, where the trophy is stuck to the dirt wall.
Summary
One of the Riddler's 243 challenges, collected once and kept for both runs.
Sources
Report an issue
Breakable: militia shield, Gotham Stock ExchangeCollectible
Location
Founders' Island · Ryker Heights – Drive to the Gotham Stock Exchange (2470, 1512). The shield is on the side of the monorail tunnel, right over the building's entrance.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Breakable: militia shield, Lex Corp archwayCollectible
Location
Founders' Island · Ryker Heights – Drive past Lex Corp and down to the undercity entrance beneath it (2316, 1401). The shield is on the entrance archway.
Requires
Summary
A militia shield, one of the 90 breakable objects: five of them make one Riddler challenge.
Sources
Report an issue
Riddle: the Batmobile at any spotCollectible
Location
Founders' Island · Ryker Heights – Right here will do, as any spot works. Summon the Batmobile, stay out of it and scan it. That closes everything Founders' Island allows for now.
Requires
Summary
One of the Riddler's 243 challenges: a riddle solved by scanning the answer, kept for both runs. It counts on the Founders' Island list, wherever you solve it.
Sources
Report an issue
Return to the Clock Tower to review the Batwing scansQuest step
Location
Bleake Island · Clock Tower – Pick the main story up on the mission wheel and go to the Clock Tower in Chinatown (2214, 2179). Climb to the top, use the secret entrance, work the bust to raise the computer, and hear out the calls. The alarm they raise can wait: one last side mission opens here, and the route takes it first.
Requires
Summary
The story's next report. The Batwing's results are waiting, and this talk announces the next main mission.
Sources
Report an issue
In From the Cold: the ship Nora, reach Mr. FreezeHidden spoiler – activate to revealQuest stepDLC: Season Of InfamyMinor spoiler
Location
Miagani Island · The Nora – A notification adds this mission after the Clock Tower talk: Alfred sends coordinates, so pick it on the mission wheel and follow the waypoint to the lone island off Miagani. Find the soldier running the Boa Sentry Drone and hack his controller with the Remote Hacking Device, then clear the rest. In the ship's control room, dodge the Sentry Gun into cover, get behind it and disable it. Lift the lockdown by hacking in with the phrase cryogenics, then drop off the ship onto the ice and enter through the hole in its side.
Requires
Summary
The last Season of Infamy mission starts on an iced-up ship held by the militia, with Mr. Freeze below decks.
Sources
Report an issue
In From the Cold: Chinatown wharf, question the lieutenantHidden spoiler – activate to revealQuest stepDLC: Season Of InfamyMinor spoiler
Location
Bleake Island · Chinatown – Follow the tracker Freeze hands you to a wharf in Chinatown. Beat the militia and check the crate they were guarding, which proves a dead end. One soldier is still conscious: question him for the real location.
Requires
Summary
Mr. Freeze's tracker leads to a wharf, and the militia lieutenant there earns Cold Case.
Trophies
  • Achievement · SteamCold Case
  • Achievement · XboxCold Case
  • Bronze · PlayStationCold Case
Sources
Report an issue
In From the Cold: Otisburg rooftop, reach NoraHidden spoiler – activate to revealQuest stepDLC: Season Of InfamyMinor spoiler
Location
Founders' Island · Otisburg – Follow the waypoint to the rooftop in Otisburg, held by snipers and a soldier wearing a Jammer Pack. Deal with the jammer first, using the Disruptor if you have bought that upgrade, then the snipers, then the rest. Walk to Nora's cryochamber for a scene.
Requires
Summary
The trail ends on a militia-held rooftop in Otisburg, and reaching the cryochamber earns Out in the Cold.
Trophies
  • Achievement · SteamOut in the Cold
  • Achievement · XboxOut in the Cold
  • Bronze · PlayStationOut in the Cold
Sources
Report an issue
In From the Cold: timed drive and the drone battle at the shipHidden spoiler – activate to revealQuest stepDLC: Season Of InfamyMinor spoiler
Location
Miagani Island · The Nora – A blast at the ship ices over the city and starts a 1:30 timer, which is generous: get in the Batmobile and drive back to the ship. Fight off the Rattler and Diamondback drones in Battle Mode. The second wave does not run out, so keep surviving until Freeze sets off what remains of the generator.
Requires
Summary
The end of In From the Cold: a race back to the ship and a tank battle. Surviving it earns The Resurrection and the Life.
Trophies
  • Achievement · SteamThe Resurrection and the Life
  • Achievement · XboxThe Resurrection and the Life
  • Bronze · PlayStationThe Resurrection and the Life
Sources
Report an issue

About this guide

Two playthroughs. Run 1 on Normal or Hard does the story, every Most Wanted mission, Season of Infamy, all 243 Riddler challenges and the Knightfall Protocol, with free roam still open afterwards. Run 2 is New Story+, played on Knightmare, for the main missions and Blunt Trauma. The Arkham Episodes, A Matter of Family and the AR challenges come last.

Last verified: Nov 5, 2026 · Patch PS4, Xbox One and Steam, latest patch, with all DLC · 0 community corrections shipped

Unofficial fan guide. Not affiliated with the publisher.