Commodore 64 - Giana Sisters

[AlsatianCousin]

This game was 100 times better than Mario Bros. I guess they were just jealous.

[DrewPicklesOgre]

@AlsatianCousin still, its a ripoff and mario will always be bigger than those Giana sisters

[janmansde3dede]

GOD MY EARS

[inextremis77]

This came after Mario Bros on the 64?

[Azarien]

It depends on what you mean: yes, it came after Mario Bros, and the developer was sued for plagiarism (and lost).

But there was no (original) Mario Bros on the C64.