Complex sentence: Thus, while multi-platform releases are becoming increasingly common, there remain franchise stalwarts that continue to exist solely on one system; and not all differences between titles on multiple platforms can be fully explained by hardware alone.
Split into simpler sentences: Thus, while multi-platform releases are becoming increasingly common, there remain franchise stalwarts that continue to exist solely on one system. Further, not all differences between titles on multiple platforms can be fully explained by hardware alone.