Killing Floor sells 1.1m copies

Indie FPS still selling well after 2009 standalone release
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Released as an Unreal Tournament 2004 mod and converted in 2009 for re-release as a standalone indie shooter, Killing Floor is not a new game.

But independent developer and publisher Tripwire has told Gamasutra that sales are still strong.

Over 1.1 million copies of the game have sold, along with 2 million DLC packs.

The Georgia-based Tripwire has sold 2 million copies of its PC titles, which include Red Orchestra and the South American first person melee game Zeno Clash.