Sale time! Activision has taken out the ole discount stamp and made a mark on a few dozen Xbox Live games. It's 50% off for games, add-ons, and a handful of co-op classics.

Looking for a deal on a downloadable game?  Got some spare change lying around?  Xbox Live is loaded with a ton of deals this week on a bunch of great games, including some truly classic XBLA titles.  Here's what we spot in terms of co-op.

This week's Xbox Live Deals focus on "Retro Shooters" - with many of them offering co-op play.  Here's what you can snag for at least 50% off the normal Microsoft Moon Buck price.

This week during E3, Microsoft is releasing some great downloadable deals for those of us who can't attend the show. Starting Monday, June 14th through the week, Xbox Gold members will have access to a variety of downloadable titles, avatar items, and games on demand at price reductions as much as 50%. Quite a few titles appear on this list, and some of these are hard to pass up.