The company speculated that people were “having fun creating misinformation” to fire up the community. There have been other rumors, including Valve News Network’s claim that it had leaked L4D3 concept art and screenshots.

This is bound to be disappointing news if you have fond memories of L4D‘s desperate escapes, last-minute rescues and valiant last stands. Valve clearly sympathized with gamers by saying that it “unfortunately” wasn’t working on a sequel, though. And look at it this way: you’re probably doing pretty well if you have to ‘make do’ with a new Half-Life game.

Besides the tonal similarities to the Alien franchise (there’s a firearm that includes a radar module, allowing you to spot enemies before they detect you), a key selling point of GTFO is a gameplay mechanic called the “Rundown.” Essentially, each time you play the game, developer 10 Chambers claims the experience will be slightly different. That’s because the studio plans to continually tweak the maps and objectives it puts you and your friends through. It also appears there will be some procedurally-generated elements to ensure no two play sessions are exactly the same.

You can currently buy GTFO on Steam for $31.49. Just note that the developer warns its game isn’t for the faint of heart. “GTFO is seriously hard, you need dedication and teamwork to survive!” it says on the game’s Steam page. “This is not a run and gun game, please watch a stream or a YouTube clip so you know what you are getting into.”