Springfield is certainly no stranger to costumed characters, but in the new update to EA Mobile's The Simpsons: Tapped Out, the city finds itself overrun by superheroes and supervillains.

In the new comics-inspired story arc, Radioactive Man meets his fiery end, leaving an opening for criminals of all stripes to descend on Springfield. It's up to players to stem the tide of evil, with a little help from the likes of Fallout Boy, Bartman and Pie Man.

During the event, players are given a free Pie Man costume, with superhero threads available for other characters as well, eventually bringing together the Superior Squad. Through completely new quests, players can also unlock the Superior Squad HQ building.

The event continues through May 24. The Simpsons: Tapped Out is available for free download from iTunes and Google Play.

What makes a hero a hero other than meat, bread, and mayo? Wait, WHAT?? Superheroes? Homer isn’t going to be happy about this one …

Heroes and villains are flooding Springfield and the fate of the town is in your hands! You’ve built your town – now it’s time to save it!

Join iconic Simpsons characters as their alter-egos fight against the forces of evil.

With new characters, buildings, decorations, and more, will you be the hero that Springfield needs!?