I always got told that games won't teach you anything, but I've learned plenty from them I reckon.
1. You can take three or four shots anywhere on the torso before dying, but a headshot is always fatal.
2. If you're given two paths in a road to walk down, you should always investigate both, just in case you miss a cool piece of treasure.
3. All spiders are pure evil and will try to kill you at the very earliest opportunity they get.
I've also picked up a fair few factoids about games over the years, and I'm about to have that knowledge tested with Epic Gamer!, a trivia title about video games, for mobiles and tablets.