A guide for the puzzle near the end where you need to push the ball, controlling the time of day, and lighting up the wall.
Note: This guide does not include collectibles.
SUPER-hard to find, but here he is! The Blackbox Project side question/mission/objective. enter GUTS from the Arboretum and catapult yourself all the way down the tunnel (watch out for the cystoids...
Talos Smuggling Ring. All Locations! Black Market Trophy / Achievement. Lily Morris (quest giver) has been working with Eddie Voss and others on the station to steal company secrets and technology....
Though this ends the game prematurely, and awards you the the Abandon Ship achievement/trophy, it's still interesting to see. What Alex says at the very end might reveal something?