If you were disappointed when you saw Zaxxon ported to the Atari 2600, you're in for a surprise with Space Raid.  Written by Oscar Toledo, Space Raid is an isometric shooter for the 2600 that tries to see just what the 2600 can do when it comes to isometric shooters.  You can read about development of the game on his blog:  Space Raid: isometric game for Atari VCS/2600.  Check out this video of the game in action...

Space Raid gameplay 2

Posted with permission from Oscar Toledo.[/align:24p0cnj2]

A zip file containing instructions as well as binaries for NTSC and PAL systems is attached below.  The latest version can always be found on Oscar's blog as well as the thread for the game he started at Atari Age (Space Raid 2600).