The day has finally come, to be able to play Team Fortress 2 co-op with friends!
The Mann vs. Machine update, available August 15th, will have you and 5 of your friends fight waves of robots in an all new mode. According to Valve, the update will have new maps and you will be able to upgrade abillities and weapons.
The robots, named "The Gray Horde", are trying to plant a bomb in one of Mann Co.'s strongholds. It's up to you and five friends to stop this new "Team". Yet, unlike BLU or RED, this horde seems to have "abilities"; instead of the Sniper, we get the Bowman, whose only attck is to fire arrows at us like the Sniper would do with the Huntsman. And the new Scout's, who are now named the Minor League Scout, ability is to stun you using his baseball. These are just a few named but there are more coming as this is only the first day of announcements, there are still to more days for more. Day 1 is "Machines", Day 2 is called "Mercs" and Day 3 is going to be called "Bounty". What more will we get? We'll just have to wait.
If you still haven't seen the trailer or would like to know more about the update, you can visit the TF2 homepage or use this link