Very complete. I've not noticed any deficiencies at all. They added a lot of features too: https://github.com/OpenRCT2/OpenRCT2/wiki/Changes-to-original-game

Very complete. I've not noticed any deficiencies at all. They added a lot of features too: https://github.com/OpenRCT2/OpenRCT2/wiki/Changes-to-original-game https://github.com/OpenRCT2/OpenRCT2/wiki/Changes-to-origina... If you're a fan of the original games, I can't think of any reason to not play them using OpenRCT2.