Course 5 of 7
Portal 2: Excursion Funnels walkthrough
Excursion funnels carry you, cubes and gels, mixed with earlier tools.
- About 28 min in the videos
- 9 parts · 43 steps
Steps from 19 text guides, 1 video to watch · checked Oct 18, 2026
What each player can do here
- 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.
- 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
Cooperative Funnels
Part 1 of 9. Ride and redirect funnels across the chamber, then open the dual door.
- AtlasAtlas puts one portal on the panel the funnel strikes or sits beneath, then a second on the wall beyond.
- P-bodyP-body rides the funnel, then orange at its end and red on a higher panel extends it across the room.
- P-bodyP-body is pressed against a button at the funnel end, which raises a platform below.
- AtlasAtlas lands on the raised platform, moves a portal to the panel by the door, and the funnel carries P-body to the dual door.
- BothThe bridge only works while one player holds the button down.
Where people tend to fall
- Shredders are the chamber hazard, and a single wrong move can be fatal.
Funnel Drill
Part 2 of 9. Route a funnel through the fizzler and carry a ball to unlock the exit.
- AtlasAtlas holds the floor button to open a wall gap, then aims purple to route the funnel through the fizzler.single source
- P-bodyP-body steps onto the faith plate into the funnel, crosses the fizzler, and releases a ball from a pedestal button.
- AtlasAtlas moves purple onto panels seen through the gap, shifting the funnel to where the ball needs it.
- P-bodyP-body sticks the ball into the funnel and places a portal in the middle of the panel it strikes.
- BothThe ball must interrupt the red laser, which unlocks the exit.
Funnel Catch
Part 3 of 9. Cut and reroute funnels so the cube and both players reach the exit.
- AtlasAtlas puts purple on the angled panel to cut the funnel, dropping Atlas into the blue portal.
- P-bodyP-body stays on the button so the ceiling barrier stays down.
- AtlasAtlas is flung into the barrier held in place by P-body and lands in the funnel toward the exit.
- P-bodyP-body steps off the button, fetches the cube Atlas dropped, and places it on the button.
Funnel Laser
Part 4 of 9. Redirect funnels and a laser so both players reach the exit stairs.
- AtlasAtlas steps onto the faith plate to be shot across, then drops into the funnel toward the far room.
- P-bodyP-body jumps onto the faith plate right after Atlas and places a portal where the funnel ends to redirect it upward.
- P-bodyP-body swaps the blue portal for an orange one and puts red so the funnel runs under the cube dispenser.
- AtlasAtlas drops a pivot cube into the funnel from the pedestal button and snags it out of the funnel.
- BothThe cube must be routed into the laser receiver so the stairs rise to the exit.
Where people tend to fall
- Falling to your death is the listed hazard in this chamber.
Cooperative Polarity
Part 5 of 9. Reverse a funnel to move a cube into the receptacle that opens the exit.
- AtlasAtlas places blue where the funnel ends and orange on the wall to the right, near the exit tunnel.
- P-bodyP-body steps onto the faith plate into the funnel, rides it to the upper alcove, and picks up the cube.
- AtlasAtlas stands on the button, which reverses the funnel so it flows back toward P-body.
- AtlasAtlas shifts the orange portal to the panel facing the wall receptacle, above the exit tunnel.
- P-bodyP-body sets the cube on the faith plate so it is thrown into the funnel, which has to carry it to the receptacle.
Where people tend to fall
- Falling to your death is a hazard here, and Goo is also listed.
Funnel Hop
Part 6 of 9. Ride funnel routes past fizzlers and crushers while one player waits.
- AtlasAtlas places blue on the ceiling where the funnel ends and purple behind the fizzler, so the funnel runs through it.
- P-bodyP-body hops into the funnel and, after the fizzler, shoots orange where the funnel ends and red to the side.
- P-bodyP-body stands on the button to flip the funnel's direction, then steps off to flip it back.
- AtlasAtlas rides the funnel and puts purple on the panel facing the exit platform, the panel with the red portal.single source
- BothOne player must stay on the far side and help the partner reach the door.
Where people tend to fall
- Material Emancipation Grills reset the portals, which can drop players to their death.
- Crushers sit at the funnel's far end, and riding the funnel there is fatal.
Advanced Polarity
Part 7 of 9. Reverse funnels and launch with faith plates to reach the exit.
- AtlasAtlas goes through the right fizzler, places a portal across the goo, then stands on the button to reverse the funnel.
- P-bodyP-body steps onto the faith plate to be flung across, then places portals to make a vertical funnel.
- P-bodyP-body stands on the platform's button, which uncovers a portal surface at the far end.
- AtlasAtlas is launched up through a fizzler and moves purple under P-body to carry them up to where Atlas is.
- P-bodyP-body steps off the switch, hops into the funnel, and exits under the horizontal fizzler.
Funnel Maze
Part 8 of 9. Route the funnel past crushers and spikes, then drop the cube into the receptacle.
- AtlasAtlas places blue where the funnel ends and purple to its left, so the funnel runs through the fizzler.
- P-bodyP-body rides the funnel through the fizzler, then shoots orange at the funnel end and red under its own feet.
- AtlasAtlas uses the button to move P-body back and forth around the crusher, pressing P-body against it while it is raised.
- P-bodyP-body moves red to the panel between the spike plates, so the funnel passes under a crusher.
- P-bodyP-body drops the cube into the receptacle, which creates stairs to the exit.
Where people tend to fall
- A looping spike panel drops from the ceiling to crush whoever is in its path.
- A turret guards the Companion Cube; one player knocks it over with the cube.
Turret Warehouse
Part 9 of 9. Block turrets with light bridges and portals while riding funnels to the office.
- AtlasAtlas puts blue where the hard light surface hits the wall, and purple on a panel to shield the turrets.
- P-bodyP-body places orange where the funnel ends and red into the wall so the funnel drops both players into the redirected funnel.
- AtlasAtlas looks up and left and fires purple onto the panel there, which shields you from the turrets.
- BothRide the funnel to the office, then put the disc into the player on the far side of the room.
Where people tend to fall
- If P-body dies, the funnel portals fizzle and both players fall.
- After the cube, the funnel takes riders to a spike plate, so death is unavoidable there.
Extras and notes
- Trick Fire Gesture (Funnel Laser end camera). Performed automatically at the end camera, then unlocked in the gesture menu.
- Can't Touch This (Turret Warehouse). Stand where the shield blocks your shot and perform the dance gesture to earn it.
- Party of Three (Turret Warehouse): spot the hidden Companion Cube along the way for this achievement.
- Obstacle Building (Course 4). Earned by completing every test chamber in the Excursion Funnels course.
- Still Alive (Course 4). Earned by finishing Course 4 with neither player dying.
Sources (20)
Steps compiled from 19 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.
- AnthyDaBeist: 【Portal 2 Coop】Full Game Walkthrough (+Extra Chambers) (Excursion Funnels from 59:41)
- Steam Community guide by rjwut, The Comprehensive Guide to Portal 2 (Wayback copy)
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 1 (Wayback copy)
- Portal Wiki, wiki-c4-1.md
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 2 (Wayback copy)
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 3 (Wayback copy)
- Portal Wiki, wiki-c4-3.md
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 4 (Wayback copy)
- Portal Wiki, wiki-c4-4.md
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 5 (Wayback copy)
- Portal Wiki, wiki-c4-5.md
- Portal Wiki, wiki-c4-6.md
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 6 (Wayback copy)
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 7 (Wayback copy)
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 8 (Wayback copy)
- Gamer Guides, Portal 2 co-op Course 4 Test Chamber 9 (Wayback copy)
- Portal Wiki, wiki-c4-9.md
- Portal Wiki, Cooperative Testing Initiative
- Gamer Walkthroughs, Portal 2 co-op: Chapter 4
- GamesRadar+, Portal 2 co-op video walkthrough, page 4 (Course 4: Excursion Funnels)