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Part 30
Portal: Revolution

Part 30

Complete the Part 30 levels in Portal: Revolution, including saving 19 Lemmings in 1:35 and 48 Lemmings in 4:00.

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Complete the Part 30 levels in Portal: Revolution, including saving 19 Lemmings in 1:35 and 48 Lemmings in 4:00.

Walkthrough
  1. 1
    For the first Lemming that passes through the laser gate, have him mine left when he reaches the ground near the balloon. This allows the rest of the Lemmings to reach the exit. You must save all 10 Lemmings.
  2. 2
    For level 075, "Touch the ground turn around," with 20 Lemmings, save 19 within 1:35. Have your blockers ready, then place the cursor on the back part of the pack and click. One Lemming should turn left while the rest head right. Bomb the Lemming that turns left.
  3. 3
    As you reach the top of the small stairs leading to the lava lake, build four consecutive bridges. Do not stretch the bridges by letting the builder walk after finishing one.
  4. 4
    For level 076, "Which Switch is Which?" with 50 Lemmings, save 48 within 4:00. Lower the release rate to 1. Make the first two Lemmings climbers/floaters. The first will turn a lever opening a floor, allowing the second to drop and turn a switch, creating a safety floor.
  5. 5
    Have the first Lemming float down for two seconds, then dig until three pieces of ground are removed. Build to cut him off; he will head left.
  6. 6
    Quickly rotate to the other Lemming approaching a switch. Make this Lemming build five steps, but DO NOT let him hit the switch, as this opens a wall causing Lemmings to fall into a pit. If he turns around, have him bash through the wall.
  7. 7
    Return to the first Lemming nearing danger. Have him build into the steel wall, turn around, and go to the exit.
  8. 8
    Return to the other Lemming and have him build up to the steel wall to his right to turn him around. Near the wide gap to the left, build to make him hit his head again. This allows him to touch the switch opening the wall to the right, freeing others.
  9. 9
    Raise the release rate to 99 and let them walk to the exit. Bomb the lone remaining Lemming.
  10. 10
    For level 077, "When Two Tribes go to War," with 20 Lemmings, save 18 within 10:00. Use only Acid Lemmings. Make the first one a blocker, the second a floater, and the third a blocker to hold the rest.
  11. 11
    Make the floating Acid Lemming a climber who will bash through the wall with arrows pointing right. Build to the right before he lands in the water.
  12. 12
    Stretch the bridge by allowing the Acid Lemming to walk a little after finishing the first bridge; two bridges will suffice. Let him climb over the wall, then dig until three pieces of ground are removed. Build to cut off the hole.
  13. 13
    The Acid Lemming will bash through the wall with arrows pointing left. When he drops, build a bridge to the left so others won't splat.
  14. 14
    As the Acid climber heads to the exit, dig another small hole, building to cut it off. Mine left so Water Lemmings have a tunnel. Bash at the appropriate time.
  15. 15
    To save the Acid Lemming making the tunnel, have him build until he hits his head on the Water Lemmings' entrance. Blow up your blocker at the top to send everyone toward the balloon.
  16. 16
    For level 078, "Bash Street Kids," with 70 Lemmings, save 64 within 10:00. Put a blocker in front of the pool of acid for the Water Lemmings. Make the third Acid Lemming a blocker.
  17. 17
    Turn both passing Acid Lemmings into climbers, and the one in back into a floater. Make the leader dig when he reaches the top of the wall.
  18. 18
    Have the climber/floater build over the pit to the right. Return to the Lemming digging through the pole and blow him up as he approaches the bottom.
Tips
  • Precise mouse clicking and timing are crucial for success in these levels.
  • Pay close attention to the disappearing floor mechanic in level 076 and react quickly.
  • Switching between Lemmings rapidly is key in several stages.
  • Do not let the builder Lemming in level 075 stretch bridges unnecessarily.
  • Be extremely careful not to trigger switches prematurely in level 076, as it can lead to immediate failure.

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