here's my brainstorming list, more suggestions welcome:
extralife.com (parked)
iheartgaming.com (personal, dead)
gameon.com (parked)
gameoverflow.com (parked)
gamerqa.com (parked)
gameqa.com (parked)
gameup.com (underused)
gamehelp.com (parked, for sale)
gamestack.com (doesn't resolve)
gamersource.com (parked, for sale)
gamerep.com (parked)
gameadvice.com (underused, redirect to gamewinners.com)
gamerlife.com (parked)
gamerscore.com (parked)
gamescore.com (blog, dead)
epicadvice.com (se 1.0, dead)