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.
Tags fps independent sales seth-tipps
![Games Day 2026 Header Artwork [Industry news] GTA creators reunite for landmark Scottish games industry event](https://mcvuk.com/wp-content/uploads/Games-Day-2026-Header-Artwork-310x165.jpg)
The Scottish Game Developers Association (SGDA) is proud to announce the return of Games Day 2026, a landmark one‑day event coming to Dundee on Friday 25 September. Building on the success of last year's event alongside DICE Europe, the 2026 edition will unite the creators behind Grand Theft Auto, senior leaders from global studios and platforms, and Scotland's thriving community of independent developers for a day of talks, panels, showcases, and networking.
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