Dungeon Defenders
Dungeon Defenders (PC, 2010) has a partial official source release.
Data checked 2026-10-13 · unbaked registry
Projects
Wikipedia: source-available (non-OSI license and/or partial SDK code); source released 2011 by/for Trendy Entertainment. In November 2011 there was a "development kit" released as free DLC which included the game's source code.
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What you need
You need your own copy of the game: these projects ship code only.
More on PC
Found via en.wikipedia.org/wiki/List_of_commercial_video_g, indiegamereviewer.com/trendy-entertainment-offer
GitHub data checked 2026-10-13. Notes are summaries from the research pass; the project pages are the authority.