Hey. It's RPG Maker 2003, the version that is available on steam. No mods or patches anything, just the vanilla version.
So do you mean RPG Maker VX Ace? Are you're other 3 games also RPG Maker of the same version?
Nah, I mean the one called Rpg Maker 2003, this one. And yeah, all my rpg maker games is made in that one.
