A platformer starring Anonfilly, with fighting game like melee combat.

The game has a pony total conversion mod called Equestria at War, which itelf has a Fallout Equestria themed mod called Balefire Blues. Both are available right here in Steam Workshop.

The legally distinct ungulate fighting game. The first six fighters are expies of the main cast of Friendship is Magic.

This amazing game has an amazing pony mod that has you play as Pinkie Pie, and replaces other characters too: https://gamebanana.com/mods/459901

An official My Little Pony game in the G5 show style. Doesn't get any more pony than this. And it's a good game too, if painfully expensive and short and not very hard.