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Course 7 of 7

Portal 2: Art Therapy walkthrough

The Peer Review DLC course: nine harder chambers mixing every element.

  • About 36 min in the videos
  • 9 parts · 40 steps

Steps from 5 text guides, 1 video to watch · checked Oct 18, 2026

0 of 9 done
Video: AnthyDaBeist on YouTube. Loads from youtube-nocookie.com only when you press play.

What each player can do here

P1 · Atlas
  • Atlas carries a portal gun with a pair of blue and purple portals; the two pairs work together, so either of you can step through the other's portals.
P2 · P-body
  • P-body carries a portal gun with a pair of orange and red portals; the two pairs work together, so either of you can step through the other's portals.

If your skill levels differ: Both bots carry the same kind of portal gun. Pings let you mark spots and time moves without talking, and failing costs little because a destroyed bot is rebuilt within seconds. How to split the roles

Separation

Part 1 of 9. Redirect lasers and cubes across the glass partition to open the doors for your partner.

  1. P-bodySend the laser through the glass wall to kill both turrets on your partner's side.
  2. AtlasRedirect the pivot cube's laser back through the glass to kill the other turrets, then drop the cube in the receptacle.
  3. AtlasHit the pedestal button for a ball, timed so it passes through your portals over the dividing wall.
  4. P-bodyCatch the ball your partner lobbed back to you through the portals and put it in the ball receptacle.

Where people tend to fall

  • The ball-passing sequence is timing-sensitive, so both players must act at the same time.

Triple Axis

Part 2 of 9. Hold a cube in the laser to switch off a fizzler, then ride and drop a funnel-and-lift combo to reach the exit.

  1. P-bodyKeep the pivot cube in the beam and route it through your portals into the receiver; the fizzler switches off.
  2. AtlasJump in the funnel, ride it past where the fizzler was and step onto the lift.
  3. P-bodyRelease the pivot cube inside the funnel so it lands on the hard light surface and redirects the laser to the lift receiver.
  4. P-bodyRejoin your partner on the lift once the cube has activated it, and ride to the disassembly machines.

Where people tend to fall

  • A crusher sits above the walkway; time your pass under it before the fizzler.

Catapult Catch

Part 3 of 9. Launch a cube off a faith plate and catch it across the room to open the exit door.

  1. P-bodyPlace a red portal on the panel beside the exit door on the suspended block, then an orange portal on the opposite side of the same block.
  2. AtlasFly out the blue portal through the fizzler and onto the upper ledge, then press the pedestal button to reveal the angled panel.
  3. P-bodyStand by the faith plate with the cube, count down, and on GO drop the cube onto the faith plate.
  4. AtlasOn the count, step on your faith plate, catch the incoming cube and set it in the receptacle; the exit opens.

Bridge Gels

Part 4 of 9. Coat the hard light surfaces and bridges with repulsion and propulsion gel to bounce across to the exit.

  1. AtlasPlace portals on the hard light surface and the panel to its left so the surface extends across the gap.single source
  2. P-bodyPut red under the repulsion gel drip and keep moving orange along the wall strips to paint the hard light bridge.
  3. AtlasShoot a blue and purple portal to extend a bridge across the room, bounce off the repulsion gel, then place the cube on the lower button to raise the platform near the exit.
  4. P-bodyPaint part of the bridge with propulsion gel, then bounce off the repulsion gel onto the exit platform.

Maintenance

Part 5 of 9. Pull the disassembly switches together, paint gel up the walls, and clear the turrets from the exit platform.

  1. BothStand at the disassembly switches and pull them together on a countdown to open the maintenance holes.
  2. P-bodyRed goes under the conversion gel leak and orange onto the gel, which sprays gel over the gap.
  3. AtlasSet the cube on a gel-painted patch of floor, then use the gel your partner spread to portal up onto the catwalk.single source
  4. P-bodyKeep moving the orange portal to paint the exit platform until a turret's floor is painted, then drop a portal under each turret to remove it.single source
  5. AtlasCarry the cube to the exit platform and set it in the receptacle; the steps to the dual door rise.

Bridge Catch

Part 6 of 9. Bounce off faith plates into a laser-fed bridge, keeping the cube aimed at the receiver to stay up.

  1. BothStand on the faith plates, do a countdown, and step on them together so the cube's laser activates the bridge under your feet.
  2. P-bodyKeep holding the cube so the laser stays on the receiver while you fly and the bridge stays up.single source
  3. AtlasPress the pedestal button again to get a new cube; the old one fizzles and the bridge deactivates.single source
  4. P-bodyOrange on the panel at the bridge's end, then cross on the bridge, passing the dual door and then the fizzler.

Where people tend to fall

  • Moving the laser off the receiver drops your partner to the platform below.

Double Lift

Part 7 of 9. Ride a funnel and swap a ball across a pit to raise lifts and reach the dual door together.

  1. AtlasDrop into the pit to be thrown into the funnel, and catch the pivot cube before it falls in the goo.
  2. P-bodyPlace a red portal on the panel the laser strikes to reverse the funnel and save your partner from the goo.
  3. P-bodyPick up the ball on the far side and release it into the funnel so it travels down to your partner.single source
  4. AtlasInsert the ball into the funnel so it settles in the receptacle, which raises the lift you are on.
  5. P-bodyInterrupt the laser with one of your portals so the other lift lowers to your level, then restore the beam to raise the lift to the dual door.

Gel Maze

Part 8 of 9. Chain propulsion and repulsion gel across a runway and turret-guarded laser to reach the exit door.

  1. AtlasStand on the panel button to expose the panel across the long runway.
  2. P-bodyRed under the propulsion gel dispenser lets gel run down the runway; ride it into the portal to be thrown across.
  3. P-bodyUse the pivot cube to point the laser through the glass at a line of panels.single source
  4. AtlasBlue goes on the laser spot and purple opposite the exit, which kills the turrets; then turn the laser to the receiver.
  5. P-bodyDrop down and stand on the button to turn off the fizzler, then bounce off the gel to the exit door.

Crazier Box

Part 9 of 9. Paint the cube with repulsion gel to free it, then wash it for the receptacle.

  1. AtlasPurple goes on the floor below the gel dispenser; standing on the button releases the gel.single source
  2. P-bodyBounce off the gel over the fizzler, press the button that flips the panel under the glass box, and mark the cube with an orange portal.single source
  3. AtlasHolding the cube in the beam lowers the lift nearby; taking it out restores the beam and the lift goes up.
  4. AtlasWash the cube in the water stream, then set it in the beam to bring the lift down again.single source
  5. AtlasMove the blue portal under the cube so the laser returns and the cube drops into the receptacle, unlocking the dual door.

Where people tend to fall

  • The cube breaks out of its glass box and can fall into a fizzler, so both players should be ready to catch it.
Sources (6)

Steps compiled from 5 text guides, checked Oct 18, 2026, and written in our own words. The videos are there to watch each part; they are not counted as sources for the steps. We did not play the game for this guide. A step marked “single source” rests on one guide so far.