10 Video Games Designed To Totally Screw With You

10. Left 4 Dead’s A.I. Director 

Valve’s four-player zombie FPS is the bench mark on which all other undead co-op shooters are based. Tight level design, easily identifiable characters and solid gunplay mechanics all wrapped up in a game that rewards co-operation and teamwork.

Orchestrating everything behind the scenes is a concept known as the 'A.I. director' (where the game is constantly thinking "If X happens, do Y") who in this case, clearly hates you. If it thinks you’re having an easy ride, it’ll spawn more and more enemies until you start to feel the pinch. Occasionally it’ll throw you a bone, placing health items and projectiles into the mix, but mostly it feels like the director just wants you to suffer.

The AI director even goes so far as changing the map, blocking entrances and forcing you to take alternate paths to reach your destination. And if it does that in a simple video game, imagine how malicious artificial intelligence will be when it finally takes over the world, Skynet-style.