User blog comment:Hollow Mario/Ideas for MUGEN 1.2?/@comment-11305349-20150108013929/@comment-24796436-20150108040226

Well that is a sort of trick question. It would be nonsensical for Mugen to have achievements " right out of the box". However, allowing custom achievements would not be such a bad idea. I just don't think that the average user would find it useful or even fun just to make up their own achievements to complete.