I've played plenty of FPS and 3rd person shooters, and I know my way around weapons and such, and I'm a pretty good shot IRL. However, that's got nothing to do with games, but because I learned (at school, no less, and bear in mind this is the UK) how to fire weapons, recognise weapons and aircraft, I had military style weapons training and I can strip down and maintain and L-96 standard issue rifle as used by the UK military in Iraq and Afgahnistan. That said, after playing video games I do know what to do in a zombie apocalypse, but that's less likely to happen...