2 games are available to download through Marketplace New Arrivals.

Net Rumble and Netters are available to download the Trial Game or Full Game for 100 microsoft points.

Net Rumble is an XNA starter kit game. Neither one will launch with or without XNA Game Launcher.

I'm sure they were accidentally put up on Xbox Live, somebody hit the wrong button.

No, Please do not purchase them. They will not work for you.

Can you please let me know where you found the games? Either way that's a good eye, thanks for asking here first. 

Thanks
Michael

Well spotted.... I see them too.

Since the RTM of Community Games needs GS3.0 bits and the beta was 2.0 bits I am betting that they are not compatibile with the beta game launcher. Even if you paid for them.

I'm also guessing that this is either a test, or someone put something on a server that they shouldn't have.... I don't expect they will be around for a long time.

http://kotaku.com/5060835/xna-games-showing-up-on-xbox-live

"Several readers have emailed us to let us know that two games have appeared on Xbox Live under the XNA Creator's Club banner. A space shooter called Net Rumble and a letters game called Netters are both available for download as we speak, as I just verified, in both free demo and full versions priced at 100 Microsoft Points a pop. Unfortunately we've also verified that the two titles seem unplayable to the average users, with XNA Creator's Club launcher errors popping up even if you have the program installed. I suppose I'll just let them sit there on my hard disk until I figure out what to do with them. Lovely."

I couldn't see anything when I logged on, but then Marketplace does vary by region and I'm in the UK.