AA member cd-w has just released a new homebrew game for the Atari 2600 called Zeviouz.  This game is a port of the arcade game Xevious for the system and far better, so far, to what Atari did with their prototype in the late 80's. 

The game is a direct port from the 7800 source code, with lots of optimizations and tweaks to make it work on the 2600.  The main differences from the 7800 version are:

• The scrolling background uses the playfield instead of tiles.
• The sprites (by Nathan Strum) are based on the arcade version.
• The ground enemies are animated, e.g. buildings open-up to fire.
• The level layouts are modified to reduce flicker.

Note that it is a CDFJ/ARM game and will only work on a recent version of Stella or a real Atari 2600 with a Harmony cart. 

Development Thread and Binary