Plays games with free weekend players and helps them survive a campaign.
If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space.
As the Charger, grab a Survivor and smash them into the ground for a solid 15 seconds.
On the concert finale, survive until the helicopter arrives without leaving the stage
Kill a Witch using only a sharp melee weapon, without anyone getting incapacitated or killed.
Navigate the impound lot and reach the cemetery safe room without tripping any alarms.
Revive 10 incapacitated Survivors while under the speed-boosting effects of adrenaline.