"Act 3" of Portal 2 is perhaps surprising only by how short it is! I think it sticks in people's heads as the largest part of Portal 2, but it's only 8 levels (

"Act 3" of Portal 2 is perhaps surprising only by how short it is! I think it sticks in people's heads as the largest part of Portal 2, but it's only 8 levels (2 intro levels, 2 for Blue Gel puzzles, 1 transition, 2 for Orange Gel, 1 finale). By comparison, the wrecked facility afterwards with Wheatley is almost double, at 15 levels. sp_a3_03 (the intro to the underground area) and sp_a3_end (the climb you mention, with the new facility hoisted on top of the springs) remain some of my favorite examples of excellent level design in video games. If you're curious, you can see the level here if you want to study how it works in a bit more detail https://noclip.website/#Portal2/sp_a3_end;ShareData=AY[=[9qH]%2884:3ZUF~r%28Vc68%28Q_$9VUg%7b3!T0GQ%29WlC1Z9HxorT?%28D49uXK7V%5B https://noclip.website/#Portal2/sp_a3_end;ShareData=AY[=[9qH...