Obsidian Entertainment työsti silloin joskus Alien-peliä nimeltä Alien: Crucible. Peli kuitenkin kuopattiin, ja projektin parissa olleet luonnehtivat peliä pelottavaksi Mass Effectiksi. Asian paljasti VG247:lle Chris Avellone.
"A rough comparison would be Mass Effect but more terrifying. "We wanted to make it. But by that point Sega, I think, was... the publisher/management relations had gotten to a point where they were just tired of dealing with [Obsidian]. Everyone working on Aliens: Crucible was really excited about it. It was shaping up to be a really cool game. The prototype was really cool. But then Sega's like 'nope!'"
Obisidianin omistaa nykyään Microsoft, joten mahdollisuudet projektin uudelle polkaisulle ovat hyvin pienet.