Portal 2: EIDOLON is a mod for Portal 2, created by Rhetorical.
EIDOLON is a short (5 map) mod for Portal 2; it has brand new music, environments, and makes fresh mechanics out of old techniques.
It's a short enough mod that describing too much can spoil quite a bit.
Extract to „...Steam\steamapps\sourcemods” and restart the Steam client.
Report problems with download to [email protected]