Stronghold (2010)

You know Doom, it is always the same, get some weapons, infiltrate the destroyed UAC base or demon hive, kill all the monsters and hellspawn and find the exit switch. This was Doom... until now: Stronghold is a mixture of Unreal Tournament's Assault mode and Skulltag's Invasion mode. Defend your Stronghold against hundreds of monsters, divided into several waves. Earn points, get rewards between waves and let no single enemy pass!