Befor i get startet i need to say: YOU CANT FIND ANY OTHER GAME... WITH MORE ENEMIES... trust me the game gives you a hell of enemies.
The style is a bit other as in the first game. You can turn a clean floor into a hell of a madness, IN SECONDS. And you now can skill your character.
There you got 4 modes
There you play a story level after level it goes harder and harder with some other parts like, car driving, city's, forest's more than just a base like the first game, you get bosses and side missions too.
Survival (Stand firm):
There you must fight against enemies until you die, stand how long as you can, after time it spawns more and more enemies, but weapons, items and powerups will spawn too.
Its like "Stand firm" just with more levels (like a little story mode) there you get an final boss.
Survival (Gun Stand):
In this mode you have like the name sayd just one gun, a turret you cant move and must fight wave after wave, after every wave you can choose 1 from many upgrades.
at least i just can say: its simple and looks maybe a little bit stupid, but i like it, and i like to kill a MILLION of enemies and THAT is was the game do RIGHT!
The ONLY bad thing is, the "intelligence ability" its gone, in a older version of this game you need this ability for your character to use implants for use stronger weapons, they removed it, its bad but doesnt make the game worse.