Galactics via Amazon offers Amazon Prime Members the Marvel Action Pack for Windows and Macfor $4.86 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $4.98.) That's the lowest total price we could find by $8. It features 10 games, including Wolverine Search & Destroy, Hulk Central Smashdown!, and Captain America: Red Skull and Crossbones.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)