I'm experiencing some trouble when playing this game on a 7800 via a Harmony cart. Sometimes the aliens and humans will just vanish from the screen and reappear at a random spot.
I've tried both the Stargate and Defender II roms, and the Defender Arcade homebrew/hack for that matter. Happens on all three.
But if I play the same files on the Harmony on a 2600, everything works fine.
Also, playing the physical cartridges of these games on the 7800 works fine.
It's just the combination of the Harmony and the 7800 that has problems.
Harmony firmware version is 1.06.
Anyone else have this issue?