What a fun surprise. Trenched is essentially a first-person tower defense game. You have some towers you can lay down and upgrade, but the most fun comes from being a tower with legs. There isn't the depth that you would expect in a dedicated FPS or TD, but this hybrid more than makes up for it with style and fun. the single-player mode Aline is worth the pric of admission, but being able to play online co-op puts this game over the top.