This collection packs 2 unique stories. In Sonic X Shadow Generations, Shadow the hedgehog is back. But he's not the only one making a comeback. Black Doom has returned to wreak havoc and take over the world. To defeat him, Shadow must face the demons of his past and unlock new, dark skills. Doom Powers will help you battle enemies, soar through the sky, and even control the flow of time. The second story is a remastered version of Sonic Generations. Dr. Eggman is rewriting history and destroying the world. Modern and Classic Sonic have to team up to save the timeline and their friends.