Great FPS that borrows from F.E.A.R. in pretty well every conceivable way. You are a member of a special task force that is hunting down high value targets associated with the corporation 'Horizon'. You can turn invisible, activate bullet time, and do a crazy slide that sends enemies flying. Enemies can additionally be grabbed and thrown (+optionally pulling their grenade to blow them up in the process) or silently killed. There are some light stealth elements at play as well, and while the AI isn't mind-blowing, it works well enough. You can get enemies attention, turn invisible, and circle around them and they will still be aiming at the direction you last appeared. This can make for a lot of fun encounters, and many of the rooms are designed in a way where the player can take full advantage of their abilities.

As it is riffing on F.E.A.R., there are also some supernatural elements and spooky sequences, but despite the game's short length they are far and few between. There aren't a ton of weapons to choose from either, but the ones that are available all feel great (the not-Vector being my favourite).

Trepang2 is definitely worth the pickup if you enjoy F.E.A.R. and just want a solid single player FPS. Outside of the main campaign, there are a whole host of survival maps where you have to last as long as you can against waves of enemies. Plenty of cheats to unlock too through beating different levels on various difficulties. Just an overall great throwback to PS3/360-era shooters.