That Time I Got Reincarnated as a Slime X Overlord

That Time I Got Reincarnated as a Slime X Overlord was a special collaboration crossover event hosted in That Time I Got Reincarnated as a Slime. It began from May 1, 2021 to May 31, 2021.

Story
The long-awaited collaboration between That Time I Got Reincarnated as a Slime and OVERLORD has officially kicked off. The Supreme One Ainz Ooal Gown will lead the Floor Guardians: Albedo, Shalltear Bloodfallen, Demiurge, and Sebas Tian to the Jura Tempest Federation. A brutal war is about to start.

Trivia

 * In commemoration of the game, players were allowed to pick five lucky reincarnated ones from those who reply and repost this post and send them each 10 Stars Contracts.