Portal: Prelude
PuzzlePortal: Prelude, as its name implies, is an unofficial prequel to the game Portal. Its story revolves around the pre-GlaDOS epoch way before she was plugged...
ROA Tempts to do something no one else has done, Portal 2's ruined and overgrown style inside of Portal 1. ( Don't expect this to be quality, This is a one man made mod! )
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