Aliens: Crucible
Obsidian built a squad RPG where marines could die permanently and a base could be overrun, but Sega cancelled it even after developers believed it looked close to shipping.
Quick facts
- Existence state
- Never Born
- Peak stage
- working prototype
- Research confidence
- high
- Last verified
What it was
A cancelled third-person role-playing game developed by Obsidian Entertainment for Sega.
A custom marine squad would explore an alien-infested planet, manage a base and survive persistent character losses.
Existence timeline
Obsidian starts work on an Alien role-playing game.
The publisher confirms the licensed RPG.
Squads, bases and alien encounters enter production.
Reports indicate the team has been reduced.
Sega and Obsidian end the project.
A playable development version becomes visible.
Why it ended
Sega cancelled the project in 2009 amid development problems and changes to its Alien game portfolio.
Last confirmed trace
A playable build, thirteen minutes of footage, concept art and creator testimony survive.
What it left behind
Crucible remains a rare attempt to translate Alien's survival pressure into a party-based role-playing structure.
How we classified it
The proposed archive unit never reached ordinary public access in the form being documented.
The strongest verified milestone maps to working_prototype under Arrival Score V1.
Sources & verification
Last reviewed 2026-08-01. Sources are linked so readers can inspect the evidence directly.