I used to run a fairly successful gaming website (gamehut.com, of course i let it drop and now ultsearch owns it
). Anyhow, GOOD descriptive gaming domains are hard to find as almost every kid and their dog registers a gaming domain and slaps a horrible page up.
Both your names are really great in my opinion, but of course .us is fairly new. Try to research who it is who is buying the domains, alot of the big gaming websites make alot of cash and they might be planning ahead. So depends on if you want to just make a decent profit on them or hold onto em, personally I would hold.