I clean the west wing, and some other thing, but I dont want to stay more here so I planned on stealing the cube... And i didnt find it anyway, even if I go through the elevator to the Utility stations I dont find a way to find it or go through some gates, Im so stuck. Do I really need to do all the quest to advance?
Sorry for my english, Im not native :p
You need to trigger "Strange tremors" quest, you have several ways:
1) Attack any of the tchortists -> Faceless invasion, tremors and making your way to the elevator into Deep Caverns.
2) Complete all(3) quests for Mediant Samuel (Preservation section) -> interview with Eidein -> blablabla
3) Complete some of quests for Principal Investigator Schteff, Principal Investigator Georgis, Principal Investigator Rista(Investigation section) -> interview with Eidein -> blablabla
4) Sneak into elevator section and hack(120-140 skill, don't remember)elevator controls or use keycard(steal from Eiden)