Vendetta seems to run fine as root, but as a normal use it seems to just segfault, Im guessing its trying to use a device the user doesnt have access to? Or possibly one of my libs have incorrect permissions?

Do you have the NVIDIA drivers? If so, do you have the /dev/nvidia0 and /dev/nvidiactl devices user-accessible?

yeah they are user accessable, any other ideas?

/dev/dsp for audio should be user-accessible. And ALL the files in ~/.vendetta should be user accessible.

You can try to use strace to find out which files vendetta is trying to access.