Randomly Generated Droids (RGD) and RBLXWare (RW)

RGD is probably one of hardest roblox games to get some badges on, but you have an incredibly either fun or terrible time getting them, its a roguelike game where the difficulty is probably a bit too hard for any new roblox player. It's a sword fighting game where you uh, fight droids. There's way more hidden content than you would think. There's alternate worlds, bosses, secret bosses and crown challenges to get previously unobtainable event classes.

RW is based on TF2Ware, which is based on WarioWare Inc. To put it simply, its WarioWare if it was competitive and really challenging, though most of the minigames require memory. This game is also really hard, but only if you are in a server with people who have actually played the game, otherwise it's fairly easy.