Footage of a previously cancelled Aliens game by Obsidian has been leaked recently
A former artist who was involved in an Aliens game before it was canceled in 2006 has uploaded some development footage from the game. The footage primarily dealt with character designs and animations but shows off some stuff Obsidian Entertainment was planning for the project.
According to some known details, the game would have been called Aliens: Crucible and was meant to for the PS3, Xbox 360, and PC. The game was also part of two planned Aliens games Sega wanted to release with Crucible meant as a RPG game and the other being a FPS, which became Colonial Marines.
In terms of status, Crucible was basically finished and preparing to enter the mass production phase before Sega suddenly dropped the project in favor of solely focusing on Aliens: Colonial Marines instead.