Super Hero Squad Online's challenge system offers a new way to earn special characters

Super Hero Squad Online
If you're playing Super Hero Squad Online, chances are you have the collecting bug already -- you want to collect every cool hero you can find. With a new feature, Gazillion's players can now flesh out their roster for free (as long as they're willing to put in some effort!).

Dubbed the Challenge System, this feature opens a series of achievements for players to tackle. Successfully completed challenges earn money and tickets, and span the entire game world. The best rewards, of course, are new heroes that are exclusive to this system, so if you want any of them, you're going to have to step up and knock out these challenges.

The new heroes coming as Challenge System rewards include Colossus, Daredevil, Firestar, Future Foundation Spider-Man, and Sentry.

[Source: Gazillion press release]

This article was originally published on Massively.