What to play this weekend (April 9-11)

With a paucity of new releases this week, it's a great time to go back and play those old Xbox games, since Microsoft is ending online support for "Halo 2," Crimson Skies" and a host of older games on Thursday. Plus, the first two "Borderlands" add-ons show up on a retail disc, and "Geometry Wars 2" is on sale.