Mann vs Machine is a cooperative mode that supports up to six players, yourself included. Together you and your friends are going to be fighting off a horde of robots.
As with every multiplayer game, team work is going to be vital in order for you to survive. If successful, you will be rewarded with incredible loot and unlocked achievements.
The brand new mode will also bring new maps with itself, along with new abilities and weapon upgrades.
Accompanying the release date announcement for Mann vs Machine was another major update for the best user-created screenshots, videos, and Workshop items. Every game will have its own new Game Hub to house all the content and give players a central location to talk with other players.
Emily Kent from Valve said:
The New Steam Community is all about showing off the best content that gamers have created. With over 89 million screenshots, videos, Steam Workshop maps, levels, mods, and items, plus news articles and product updates, the community has created an unbelievable wealth of content around their favourite games.