Long before Luna betrayed her sister and became Nightmare Moon, another enemy came to Equestria. Its arrival was foretold with rain from the heavens and it wreaked havoc on the growing nation and its people. Much time has passed and the people of Equestria now live in ignorance of the ancient past. However, when its return brings disharmony, Celestia must now find a way to end the rebirth of a new war before her subjects become the new victims of a Massive World Threat.

Based on the game Halfbrick
Colossatron is owned by Halfbrick Studios