Xbox 360:
Fallout 3 - epic, massive open enviroment, play the game as you wish, plenty of exploration and new things to find and do, great story.
Fallout: new vages - Truly Epic, bigger than fallout 3, much more to see and do, great story's (4 different endings) and the dlc dead money is awsome, cant wait for the next one.
Half life orange box- Half life never gets old, great games, music, story etc.
Left for dead and L4d 2- great zombie shooting fun, better played online with a bunch of people as the AI sux.
battlefield bad company and bad company 2- great stories, not as serouse as the MW games as there is allot of comic releif in these titles, many hours of fun to be had on multiplayer too, infact i would say that bad company 2 has the best multiplayer of all FPS's and just got better with the Vietnam dlc

.
Crysis 2- Simply Awsome, no other words needed.
Assasins creed 2- the best game of the series, good story, atmosphere etc.
Metro 2033- Fans of the S.T.A.L.K.E.R pc games will love this dark, creep russian game set in the Moscow metro stations. Its very atmospheric, will make you jump and has a good story with meaning. I have played thrue this game 4 times and still love it.
Nintendo DS:
River king Mystic Valley- The only game i own for the DS and love it lol, yeah im 29 yrs of age and play a kids game

but honestly, i doupt kids would like this game, its more of a game for older people and more so for people who love fish and are anglers like myself. I play this game when i feel like going fishing but either can't becouse of the weather or don't have the time as its an hours drive to the lake for me.
Plenty of monster fish in this game such as-
Arapaima.
3 types of arowana.
3 types of snakehead.
sturgeon.
Couple of dirrent types of gar/pike.
monster catfish, monster bass, trout, salmon, carp, Japanese hutchen etc etc etc. the list of fish in this game is massive and each one responds differently to different types and styles of rods and lures. I finished this game 2 days ago having cought the MASSIVE RIVER KING FISH!

Definately worth a try.
Cheers-
Darren