idea for a cool portal game?

need help with custom portal gun mod

hold up, is virgil gay?

Stuck on the 1 turret and laser chamber

How can I select a specific Chamber?

Worth replaying in advanced mode after finishing the normal one?

Game way too dark with my Intel i5-6200U's iGPU

MEL won't start: "Steam is not running. You must start Steam in order to play this game"

Crash after "The next chamber is the broken one"

My game crashes when I open a save.

No longer start in Linux

can't move with my controller

the first 01 chamber is diff to utube vids, and i cant figure out how to do it cos of the blue forcefields addition

Interesting Bug in sp_a3_transition

Can you people make a MIDI file that goes along with the soundtrack for each song?