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Test Chamber 4
Portal 2

Test Chamber 4

Need help with Test Chamber 4 in Portal 2 Co-op? Follow our step-by-step guide to master the infinite portal and mass/velocity puzzles. Get through it with ease!

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Need help with Test Chamber 4 in Portal 2 Co-op? Follow our step-by-step guide to master the infinite portal and mass/velocity puzzles. Get through it with ease!

Alright, let's get through Test Chamber 4 in Portal 2's co-op mode. This one's all about using momentum and coordinating with your partner, so pay close attention!

Walkthrough
  1. 1
    Player 1: Your first job is to set up an 'infinite portal' loop. Look straight ahead to the two tall wall indents. Place your first portal to the right of these indents.
  2. 2
    Player 2: Now, jump into that portal you just set up. You'll be zipping around thanks to the infinite portal setup.
  3. 3
    Player 1: As Player 2 is flying, immediately go to your left. You'll see a horizontal panel near the ground. Place your *exit* portal on this panel. This is crucial for Player 2 to gain enough height.
  4. 4
    Player 2: While you're soaring upwards, keep an eye out for a switch near the top. As you approach it, press your action button to activate it.
  5. 5
    Player 1: Right after you place that first horizontal portal, quickly move left and place your *entrance* portal on the panel you see there. This ensures Player 2 keeps their velocity as they pass through both portals.
  6. 6
    Player 2: Once you've hit that switch near the top, you should find yourself sailing up the other side of the wall. As you reach the top, you'll release a weight ball.
  7. 7
    Player 2: Now, grab that weight ball and drop it into its designated area. This will open up the exit for you both.
Tips
  • Communication is key here! Make sure you and your partner are talking to each other about portal placement and timing.
  • Player 1, placing the portals quickly and accurately is vital for Player 2 to maintain momentum.
  • Player 2, don't miss that switch! It's your cue to release the weight ball.

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