The comic book company, which develops properties for adaptation in other mediums, aims to ultimately generate $9.5m for expansion.
"Radical reserves a certain kind of digital publishing right that allows us to have a little more creativity in the user interface of the experience, without it being a game," Radical co-founder Jesse Berger told Variety.
"We're always on the hunt for new IP, and we're always looking to develop new IP with the top creators in the business, and at the same time, we have a tremendous catalogue."
Radical currently has two cinematic adaptations in development - Tom Cruise's Oblivion for release in April and the Dwayne Johnson-starring Hercules due next year.
The company's latest batch of funding came from Wolfiskin Productions, a company best known for its work in music video.
Watch a trailer for Oblivion below: