I was pulling my hair out trying to understand why my Chip-8 emulator was passing all the tests, emulating all games perfectly EXCEPT space invaders: Shooting down one ship killed 2 of them.

Tried to Google for someone with the same issue, nothing.

Went to the emudev Discord to try to ask about it, turns out someone asked exactly the same question 2 weeks ago. Kind of bizarre seeing someone posting a video with the same bug so close in time.

Turns out that space invaders is not made for CHIP-8, it's made for SUPER-CHIP Legacy (1.1).