Team Fortress 2. Featuring "many informative placards about the fascinating details of life in a turn-of-the-century mining community," Coal Town is the second piece of content added as part of TF2's new co-op mode.
The recent update also includes upgrade stations, allowing players who collect money from downed robots to boost stats and skills of weapons, items, and abilities.
Each class in the free-to-play shooter has their own upgrades available, such as the Soldier's ability to empower his entire team. More details on the upgrades are available on the official TF2 blog.