This post is from one of several previous incarnations of this site and probably doesn’t quite fit the current format. In a former life this was a group blog and a tumblelog before it became a static jekyll site. If anything looks broken or is worded oddly that could be why. Pardon the dust.
On friendly fire in games. I think HL2 gets it right here, lowering your weapon when facing a non-combatant and letting you break mission critical apparatus but giving you a carefully worded game over message straight after.