Extremely fun build-engine FPS.

A ridiculous but really fun and punchy arsenal (I'm pretty sure dual-wielding SMGs that shoot burning flechettes is a violation against the Geneva conventions somewhere), really good level-design featuring a ton of secrets, and fast shooter action.

If you liked Blood or Duke Nukem for their action, I wholeheartedly recommend this game. Be warned, however, that the levels in this game are significantly longer.