Last month we reported on four indie games going open-source that were part of the pay-what-you-want "Humble Indie Bundle" after the developers experienced very favorable returns. The source-code to Aquaria has now been published with the source-code to the three other titles (Lugaru, Gish, and Penumbra Overture) already being available.

Aquaria has gone open source under the GPL! Now all four of the games that pledged to open in the Humble Indie Bundle are officially open source — the others are Lugaru, Gish, and Penumbra Overture. I am especially excited about the modding possibilities for Aquaria because of its excellent level editing tools. Here’s a video showing an early version of the editor:

As of 5/11/10, Aquaria, Gish, Lugaru HD, and Penumbra Overture pledge to go open source.

Following the recent success of the Humble Indie Bundle, developer Cryptic Sea has released the source code for its 2D physics based Gish platform game

Lugaru HD was a part of the Humble Indie Bundle which allowed users to pay whatever the want for some great cross-platform games. They said they will open-source the games if they reach 1,000,000 - which they did, so all the games are about to be released as open source.

Wolfiregames the developers of the Lugaru that are currently working on Overgrowth have posted about The Humble Indie Bundle – Pay What You Want Program! Five games in the price that you decide !

In the spirit of the Humble Indie Bundle, we have decided to release the source code to Lugaru! Our community has already made some great mods by editing the levels and graphics, but source code access will allow for much deeper modifications.

Following the success of the recent Humble Indie Bundle, four of the five indie games developers have announced that they will be open sourcing their games and one has already done so

It has been in our minds for quite some time and now finally it has become reality: Penumbra:Overture and the HPL1 Engine are now open source!