William Parks is a Game Rant editor specializing in puzzle-driven games, detailed walkthroughs, and collectible-focused strategy guides. After graduating from the University of Southern California’s ...

Although Marvel Cosmic Invasion is mostly about taking control of its impressive roster of heroes to beat the snot out of Annihilus's goons, it has some bonus content for true believers to seek out.

However, the game won't tell you what the reward for each slot is until after you've inserted a cube, which may prove frustrating for those who don't want to complete every challenge in Marvel Cosmic ...