Portal 2 videos reveal Aperture Science’s Repulsion and Propulsion Gels

Today’s vids, part of Valve’s week of Portal 2 reveals, show off two new game mechanics, the Propulsion and Repulsion Gels. Apparently intended by Aperture Science to be used as weight loss aids, the two “largely non-toxic liquid forms of fiberglass insulation” were pulled from the shelves after testing revealed that people need to digest food before expelling it, and that trying to bounce food out of a dieter’s stomach is impractical.

The writers at Valve really deserve a video game Pulitzer, an award I just made up, for the clever Portal 2 dialogue and captions they've been creating. Oh wait, only bitter English majors desperate for artistic validation care about writing in video games!

Repulsion Gel

The Repulsion Gel is a blue liquid that works like a portable trampoline. From the video it seems to endlessly leak out of a tube in a sphere shape, allowing Chell to redirect the blobs to where she needs them. Once the blobs hit the ground, they create a large blue puddle that launches Chell to areas much higher than she could reach normally.

Propulsion Gel

The Propulsion Gel works a lot like the classic "ice floor" effect in games, slicking to the floor and causing you to build up speed in a straight line, but making it hard to stop. The orange Propulsion Gel seems to come out in a constant stream, allowing you to paint the level with it via the portals. When used in conjunction with some ramps, the gel looks like it’ll be able to launch Chell clear across big gaps and timed hazards.

While it’s pretty clear what these two goops do, it’s unclear if they evaporate or remain in place for the duration of the level. While it seems you can get pretty liberal with slopping this goop everywhere, we bet that later levels will require very strict usage lest you bounce into a Thermal Discouragement Beam or slide into a wall of spikes.

Jul 1, 2010




  • Axcleblade - July 6, 2010 7:01 p.m.

    @Defguru7777, The Party Associate (from the updated ending of Portal)apparently put Chell in a stasis pod, similar to the one she woke up from at the beginning of Portal. Wheatley was the one to wake her back up. This is from the Portal 2 issue of GameInformer, back in April.
  • Darthspud - July 3, 2010 8:58 a.m.

    awwww, does that mean it was the last of those videos? With GlaDos at the end.
  • slimjim441 - July 3, 2010 6:18 a.m.

    @Defguru7777 It does take place loooong after the first one. Now, not many people know this, but Chell is an android, making the time gap seem more plausible.
  • Crabhand - July 2, 2010 8:19 p.m.

    I'm so hyped for Portal 2, the deceptively simple mechanics they've shown off thus far make my head asplode from the complicated nature they will use them.
  • Defguru7777 - July 2, 2010 7:43 p.m.

    I'm probably wrong, but are they sure that's Chell? I thought Portal 2 took a long time after the first one. Of coarse I haven't been following Portal 2 news as closely as I should be.
  • slimjim441 - July 2, 2010 7:16 a.m.

    I would KILL to play this game. This looks like the best first-person game I've ever seen (yes, beating Metroid Prime 3)!
  • nadrewod999 - July 2, 2010 5:05 a.m.

    @JohnnyMaverik: Chell (AKA the player) used a combination of the repulsion gel and movement through portals to fire herself at a previously out of reach platform so that she (AKA you) could move on, and get a little bit closer to "freedom" (I don't know what will actually be achieved)
  • Rapturous - July 2, 2010 2:15 a.m.

    I love you Eric, no homo.
  • JohnnyMaverik - July 2, 2010 1:14 a.m.

    Looks awesome, although I have no idea what happened at the end of the repulsion demo... crazy.
  • nomnom52 - July 2, 2010 1:06 a.m.

    I like the effect where the Propulsion Gel makes you temporarily looking through orange glasses.
  • EricBratcher - July 2, 2010 1:02 a.m. Here's a sneak peek at some of the ways you may see that gel employed.
  • ThePrivateer - July 2, 2010 12:10 a.m.

    OH MY GOD THIS LOOK SO COOL. But yes. Make Episode Three, please.
  • Rapturous - July 1, 2010 11:33 p.m.

    I cannot wait for Portal 2, and I'm pretty sure my life is going to be consumed by it. Now just show me a little Episode Three love VALVe.

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