Utterly Mad

Clear Sky is the buggiest out of all of them, but yeah SoC does have a few bugs. I've never had any problems with CoP though.

Few of the bugs are generally game breaking or will cause major issues, they're just a little annoying. I think a lot of them are to do with playing on Windows 7&8 so if you're running XP or Vista you should be fine.

CS is buggy as fuck. CoP is kinda buggy. SoC is HILARIOUSLY buggy at times. Like, it has funny bugs, not its funny it has so many bugs.