UPDATE 19/11/21: Atari has now amended its website with the correct information.
“In our marketing materials, the developer credit for Saboteur was applied to Yars’ Return and we failed to spot the mistake prior to launch,” reads a statement to Eurogamer. “The Atari homebrew community is extremely passionate, and we appreciate that they immediately brought the issue to our attention. We have updated the information on atarixp.com and will share more information about the game’s creators and legacy in the coming weeks.”
The statement also explains further background to the game.
“Yars’ Return was a homebrew adaptation by Curt Vendel of Howard Scott Warshaw’s game Yars’ Revenge. Yars’ Return was included with the Atari Flashback 2 Game Console, which Curt developed for Atari. After the initial release, Dennis Debro worked at Curt’s direction to make some improvements and enhancements, and that revised version was included in later releases of the Flashback.