Portal: Stay Inside is a third-party addition to VALVe's game Portal 2. Taking place in the familiar Aperture Science facility at an unspecified point in time, the mod may veer away a little from the franchise's canon but will stay within believable bounds. The mod is expected to have roughly four main areas covering the game's clean, destroyed, and early testing environments. A primary focus for me as the developer is to create an engaging storyline with enjoyable and asthetically satisfying chambers and environments. I am considering making the mod episodic, depending on how development proceeds, but in any case it is currently still under heavy development and closed beta testing. There is currently no expected release date. Stay tuned for more information!
A screenshot from P:SI Chamber 04. For information on why the portals aren't green and purple see News Update #004.