Hello all, like any good employee, I like to take to my laptop to work when my manager won't be in (making me the "manager" on duty) and would like a good game to play. We're cheap and don't have WiFi and our only ethernet cables can't be pulled because it will knock our register systems offline. Which leads me here to ask the community: what is your favorite First-Person Shooter game that can be played offline (good campaign I guess?) and is free to download?
Thanks in advance all.