Team Fortress 2
In Mann vs. Machine (commonly abbreviated as MvM), a team of six players (all wearing RED uniforms) must stop hordes of robots divided into waves from deploying a portable bomb into their base. When a robot is destroyed, it drops an in-game currency known as "credits." Players can pick up these credits before they disappear and use them to buy upgrades for their weapons and themselves. Some weapon upgrades include more damage, faster firing speed, more ammo, etc. Some player upgrades include faster speed, higher jump height, health regeneration, etc. There are different kinds of robots with different weapons and abilities. Some robots are known as "Giants." A giant normally has far better weapons and abilities than their normal counterparts.