Sega and Gearbox Software are the defendants in a lawsuit claiming the two companies falsely advertised Aliens: Colonial Marines with unrepresentative trade show demonstrations.
Source: http://www.polygon.com/2013/4/30/4287382/aliens-colonial-marines-lawsuit-class-action-sega-gearbox
If you don't know anything about this; basically the promotional material wasn't representative of the actual product, and the actual product turned out to be a big steaming pile of **** which very few people liked. Oh, and apparently Gearbox outsourced the game to another studio and spent some (read: A lot) of the publisher's (Sega) money to fund their popular hit Borderlands 2.