Flash can create some pretty awesome stuff, and games are no exception. Got a good game to recommend? Post it here!
My favorite go-to game is Elements, a card game kinda like Magic the Gathering. Force your opponent to draw out their deck, or loose all their life, and you win. Sounds easy, but there are a ton of cards, elemental mana, magic attacks, and lots of other things. Oh, did I mention it's totally free? No booster packs to buy, no supplements, it's totally self contained. Watch out, though- most of the real human opponents are killer hard- way harder than much of the computer AI.