Hi. I'm using archlinux and I can't start vendetta-online. And when I'm starting game from terminal I get error, which is in subject. also, before error, there are about 30-40 lines with "Xlib: extension "GLX" missing on display ":0.0"." Can anyone help me? thank you

Are you able to run any other OpenGL apps? It looks like you don't have GLX installed, which is part of your video card's drivers for OpenGL. What hardware are you using?