This mode gives the player the ability to play as Proto Man (also known as Blues in Japan), who has the "Proto Buster," the ability to slide, and use his "Proto Shield" for defense. However, Proto Man takes twice the damage, has twice the recoil, fires slightly lower shots (he can hit enemies Mega Man would normally miss on the ground) and cannot access Dr. Light's Lab to purchase supplies. There is no story for this version of the game.

Roblox is a massively multiplayer online platform marketed toward creators and players of all ages. It allows users to create their own virtual games using a variety of objects, which they and others can enter and socialize in. Games created on Roblox can be scripted using a sandboxed scripting language based on Lua 5.1 to affect events that occur in-game and create different scenarios.