sonic x shadow generations
ソニック_×_シャドウ_ジェネレーションズ ソニックシャドウG SonicXShadowGenerations
A remaster and companion game release of the console/PC version of Sonic Generations developed by Sonic Team, featuring additional new content with Shadow the Hedgehog as a playable character. The re-release version contains a new campaign called "Shadow Generations", centering on Shadow as he must stop Black Doom from taking over the world, as well as new features to Sonic Generations.
This tag implicates sonic_generations (learn more).