Antichamber vs Crysis Warhead
Antichamber
Antichamber is the sort of game you'll want to play if you have a strong appreciation for MC Escher's mind-bending worlds and you have always imagine what it'd feel like to be in one of these worlds. Being an almost impossible puzzle game where hallways wrap around each other and spaces rearrange themselves, the game aims to push you out of your comfort zone and make you question how the game work (Hint: there is no permanent set of rules in this game and eveything you know can be changed). With your trusty gun in hand, you will need to create, destroy and manipulate the very matter itself to solve the puzzles you get and move on to the next stage.Antichamber is a puzzle game that's unlike any other. If you enjoy getting your mind blown wide open, this is the type of game you'll want to play... guaranteed!
Crysis Warhead
Crysis Warhead is somewhat like a spin-off mainly because it doesn't really continue the plotline in the main Crysis franchise. Instead, I'd venture as far to say that this game might be a prequel to the original Crysis... maybe? Anyway, in this game, you play as Sergeant Sykes who find hismelf on a life-risking mission to retrieve a cargo that's incredibly important behind enemy lines during the Korean war. The gameplay in this game is amazing visceral and intuitive, and of course, between the suit's abilities and the wide range of weapons, you'll have multiple methods to take out your enemies and walk away smiling.There are also aliens of course - it's just Crysis being Crysis - but the enemy AI is a whole lot more intelligent and may just catch you off guard if you're not careful.
As great as Crysis Warhead is, the game can be a tad bit short for its full price. However, if you can get it during a promotion, the game will be very well worth the experience, the time and the price.