TeamXbox writes: "One of the games we were most excited to see at today's big Microsoft X10 preview event was Halo: Reach, the prequel to the best-selling, Master Chief-starring Halo series. Bungie, as usual, did not disappoint. The demonstration we saw consisted of a short "making of" video and some live-action running around a level devoid of enemies. This level will also be featured in the multiplayer beta, which will go live on May 3. If you bought Halo 3: ODST, you should have an invite."