Altered Reality mod for Prey

This is the first episode of my "episodic map pack" for Prey.
The goal is to create a singleplayer, interactivity-driven first-person story that will hopefully appeal to Prey fans and generally to 3DRealms fans, as well as portray some locations that differ from, and have a higher interactivity level than, the usual space stations levels.
The famous Portal Wrench mod (thank you Sars!) is included in this project, and sometimes, the only way to make progress will be to open some dynamic portals. Portals have a lot more potential than just being used as doorways, and I hope to unlock some of it.
The title is "Altered Reality" because that's what the story is about. A malevolent entity is slowly altering Tommy's reality, and the disruptions will become more and more severe as the story progresses.