GNU Robbo is a free open source reimplementation of QXLand’s Robbo for the Atari XE/XL from the late 1980s. The gameplay of the original is faithfully reproduced with a few modifications.

Release notes:

2010-01-16 Thunor * Made a 0.65.6 maintenance release (r328) since there were many important fixes in SVN but hardly any new features or content.

http://gnurobbo.sourceforge.net/