We haven't seen Alienation since Gamescom 2014, but the top-down shooter is looking pretty good in a recently released video.
The video, posted to developer Housemarque Games' YouTube channel shows an early pre-alpha, three player cooperative session. It's still a work in progress, but Alienation seems like a mix of two of Housemarque's previous games. On its website, Housemarque describes Alienation as a spiritual successor to the top-down zombie shooter Dead Nation, and it does seem to share similar characters and level design, but it also looks like it has the fast pace action and weapon types of Super Stardust HD.
Alienation is a four-player action game with drop-in drop-out multiplayer exclusive to the PlayStation 4. It will have cooperative, single player, and player-versus-player modes. Housemarque has yet to announce a release date, but the game's official site says it's "coming soon." Sony also previously confirmed the game for a 2015 release.