After over two years of an elaborate game, where Valve dropped subtle hints in trailers, maps and sites, the studio revealed the Mann vs Machine update. Going live on August 15, this is a co-op mode that allows teams of five players to take on a new robot faction. The robots are based on the popular Team Fortress 2 characters.
The co-op mode is similar to horde, with waves of enemies and the option to upgrade abilities and weapons. Check the amazing announcement trailer below and expect more news soon.