Heroes of Robloxia features an semi-open world setting, where some areas of the city are granted. There are 5 playable characters. Each character has a certain ability, for example, Captain Roblox has enormous super strength (unlike the other 3.) An optional 2-player cooperative play mode, is also present.
In Roblox City, a group of bank heisters show up at a bank as Cicada is seen stealing bars of gold, thinking he is more rewarding of the bars. Captain Roblox and Overdrive defeat all of the goons, but the leader escapes to the rooftop of a hotel. When Captain Roblox gets off the crane and onto the rooftop, Cicada escapes, explaining his boss will be happy. After Cicada is defeated, Darkmatter uses the gold bars to his device.
After learning of a break-in at a chemical factory, Captain Roblox, Overdrive, and Tessla search for clues as to what the Atomic Breaker is up to. The Atomic Breaker Meanwhile, Darkmatter uses uranium crystals to fuel his devices. Captain Roblox then learns what the Atomic Breaker was doing there; the chemicals stolen were being used for Darkmatter's machine. After a heist attempt at the Roblox City Museum for alien technology, Captain Roblox meets Dynamo in the Planetarium. Meanwhile, Darkmatter steals the alien technology and finishes his machine.
Captain Roblox, Tessla, Overdrive, and Kinetic team up to meet Darkmatter at the bank once again. Darkmatter uses his growth machine to fight the newly assembled team. After defeating Darkmatter, the city returns to normal and Darkmatter breaks free to reveal a lost superhero named Amethysto.
On 5 February 2017, the Roblox Twitter account tweeted a message calling all developers to pitch their ideas in for a superhero themed event. The developers chosen were asked to create that idea in 3 months, and the game was officially released, along with the Heroes of Robloxia tie-in event on 20 May 2017.
A new Spider-Man Homecoming event was released on 26 September 2017 and featured the game with a new “Mission 5” to defeat Vulure. On 25 April 2018, the Heroes of Robloxia Twitter account announced that the game would be receiving a book.
- This game was referenced in Egg Hunt 2018: The Great Yolktales, through the boss fight against Rabbid Rabbit which was accessed through Wukong Jungle. The player would spawn in the boss fight as Amethysto.
- The heroes (excluding Amethysto) are seen in a zombie-like state inside of cells which are found through a maze in Hallow's Eve 2017: A Tale of Lost Souls