Gamma Energy

From the Portal Wiki

Gamma Energy is a mod released on ModDB based on Portal in which the player enters Aperture Science to be tested in a series of chambers where GLaDOS may not harm the player.

Gamma Energy
Gamma Energy banner.png

Basic Information
Developer:

Gamma Energy

Publisher:

ModDB

Distributor:

ModDB

Engine:

Source

Released:

2010

Modes:

Singleplayer

Genre:

Puzzle

Ratings:

9.1 on ModDB

Platforms:

PC

Requirements:

Same as Portal

Reference

Notice

Gamma Energy's start animation is not compatiable to newer Steam version so if you throw it in sourcemods it will can't boot up.