Orcs Must Die 2! is a 3rd person game that involves the many slaying of orcs, while either working with a friend or just by yourself along with the aid of the many traps and weapons this game provides.
The levels are unique in every way possible some levels are small and simple while others are huge in terms of how many entry points and also how many different routes the orcs must take.
This game also supports Mods however there is this bug that makes the game null and void so if you try to play it once after hours and hours of using a modded version of the game, sadly all of that will be gone in an instant. I think there is a fix for it but i wouldn't risk it.
The modes that are offered in this game is nothing but plain super awesome, you will lose hours and hours playing with game with either a friend or by yourself.
I recommend such a game if you like killing orcs and seeing orcs getting killed by traps or by the hands of your co-op partner and you.