What game should I buy for my new Xbox 360? Bio-shock or Mass Effect?

[darthlunchbox]

I own and love my PS3. I got the Xbox 360 as a wedding gift so i am looking for a good exclusive title to play on it. thanks!

[codgamer66]

if your looking for a scare type of game, go for bioshock. but if you want a longer game get mass effect

[scott r]

i've been playing bio shock for the past couple of days off and on. that is one spooky game. crazy people coming out of everywhere. the a.i. is good.
definitely a mature rating. you will jump a lot especially if you have the lights low.
have fun