One of the big things Sonic the Hedgehog had going for it that video game movies often do not was a cast that clearly grew up loving the characters and franchise they were now a part of. That, in theory, made it easier to act through a movie with a somewhat less than thrilling plot (though fun all the same.)
Source: io9 – In This Exclusive Sonic the Hedgehog Clip, the Cast Discusses the Joys of Gaming