The Blue Sun Mod

[R@S]

Here 'tis

7.62 source code

The code is a hybrid between C and C++, but if you know either of those it should be fairly simple to understand.

And this was not leaked, and it was a conscious decision of Aperion to release it, they knew it would give the game a longer shelf life. It's understandable, at least when they were still in business, that they wanted to protect their SPM and weapon system.