Resident Evil Revelation, if it's still available at XBL store for that price.
Deadly Premonition Culdcept Saga Lego Batman 2 --- Hey so the guy did a 360 on the X720 thing.You mean a 180 on the X720 thing! If he did a 360 on the X720 thing,it would still be the X720!!What?Trust me. Blam!!
AC - yes it's a great series IMO and has a great story Fallout - eh personally I think people only hold it up so high just because it's a Bethesda game...I just can't get into it Dark Souls - never played it so can't comment there --- not changing this sig until i feel like it - started 6.23.2009
Topic creator, you realize how many games can be found for 20 bucks nowadays? You might as well ask for a list of the 30 best 360 games cuz i guarantee the bulk of em, if not all of em, can be found for around that price range.
That said, Max Payne 3 is phenomenal. Red Dead Redemption is also amazing.