Gels: Difference between revisions

* A fourth gel, "Sticky Gel", was tested within ''Portal 2''. It would have allowed players to walk on walls and ceilings; however, it was removed early on during the development due to making play-testers motion-sick.<ref>Chapter 8, page 4 of ''[[Portal 2 - The Final Hours]]''.</ref>

* Repulsion Gel was [[Aperture Science]]'s first attempt at creating a dietetic pudding substitute.

* Similar to the way in which the student game ''[[Narbacular Drop]]'' became ''Portal'', the paint mechanic was borrowed from a student game called ''Tag: The Power of Paint''.