Right now the only way to mod the game is use custom Rulesets, and there is no real way to change behaviour of some elements or add any custom ones. Is there any chance to implement script engine and bind game API with it? Maybe add some events here and there (ie. onFire, onHit)?
It would allow people to modify game via mods, without any request to implement feature into OpenXcom.
I've started once my own X-Com engine in Java with LUA support but I've never finished it. I thought it might be a good idea to implement it here.