I loved the cartoon "Thundarr the Barbarian" (1980-1982) as a kid, and wrote HERE previously about the proposed "Thundarr" toy line that was abandoned when the TV show was cancelled and the toy company went bankrupt.
Today I learned of another, similar casualty. Apparently a "Thundarr the Barbarian" video game was developed in the early 1980s for Atari and for ColecoVision. You can view the original, full color press release for the game, including box art and a screen grab HERE. But this may've been a blessing. The game was apparently canceled after the licensor, the animation company Ruby-Spears, determined that it was not of sufficient quality. But you can judge that for yourself, as it turns out. The game was released in 1984 anyway, under the revised title, "Tomarc the Barbarian," and here is a 4 minute clip of it: