Bit Blot has made good on their Humble Indie Bundle promise, releasing the source code for Aquaria, available to download now via Wolfire’s blog.

Co-creator Alec Holowka describes in a blog post how difficult it was to release it mentally, describing  the code as “more like a weird tangled evolution of the game, rather than a clean, factory-built design. (there’s even stuff in there from back when the game was an RPG, for example,)” concluding “In any case, hopefully some people will find the code useful, and hopefully some will manage to improve it.”

With the release of the game’s source, the HIB promise is complete with Lugaru, Penumbra Overture and Gish already having released their respective codes.