Co-op horror GTFO is having a free weekend to celebrate its seventh Rundown, but what exactly is a Rundown? With the introduction of its seventh Rundown, GTFO is hosting a free weekend ending June 20. The four-day event lets players try out the unique mix between survival horror and stealth shooting. Players who enjoy their time in the terrifying Complex can also pick up the game for 25% off. Here’s a quick rundown of how GTFO works and how to get started as a new player. What kind of game is GTFO?GTFO is a team-based survival horror game with preset levels and largely random enemy spawns. Pla…