Portal Offset is a Portal 2 Mod that aims to have 5 test chambers so quite a short mod with custom dialogue and soundtrack.
My demo on Youtube I have changed a lot since then. I have changed the menu music the extras section and the chambers since this video but this is the only demo on YouTube. I probably will change the chambers to be better though still anyway. This was back when it was still called My Mod I have renamed it to Portal Offset now.
This isn’t a game file it is a video