Questions answered by shoricsmat

http://gamenac.com/batman-arkham-city/side-missions

gamenac.com/rage/hidden-rooms is a good walkthrough for unlocking/finding the hidden rooms for wolfe...

gamenac.com/rage/collectible-playing-cards has a complete list of all the cards and locations in a s...

gamenac.com/dead-island/collectibles/skulls is a good walkthrough for all the skulls and their rewar...

you can't, but they respawn and there are a few new ones always sitting around in the same spots

http://gamenac.com/gears-of-war-3/multiplayer-unlockables/weapon-skins   there are quite ...

http://gamenac.com/gears-of-war-3/multiplayer-unlockables/characters   searchable table w...

http://gamenac.com/gears-of-war-3/multiplayer-unlockables/ribbons   has a good list in a ...

http://gamenac.com/gears-of-war-3/multiplayer-unlockables/mutators-and-executions   has a...

nope unfortunately, everyone always looks the same

not on the same system, but system link or online

http://gamenac.com/la-noire/walkthrough/patrol-cases/upon-reflection has a good walkthrough - he...

  gamenac.com/dead-island/collectibles/skulls   complete guide with locatio...

gamenac.com/dead-island/collectibles/skulls complete guide with locations, rewards, etc

http://gamenac.com/dead-island/crafting has a good list, searchable too

http://gamenac.com/resistance-3/journals   Has a good list of all the journals and their ...

http://gamenac.com/warhammer-40000-space-marine/servo-skulls   has a good list for all 48...

http://gamenac.com/deus-ex-human-revolution/side-missions has a good write up for the Cloak &...

http://gamenac.com/deus-ex-human-revolution/collectibles has a good list for praxis kit location...

http://gamenac.com/deus-ex-human-revolution/collectibles here is a complete list for all the hug...