Adopt Me, the cute animal game based in the Roblox platform, is getting an Easter-themed event--a few weeks after Easter. The update adds a new ultra-rare lamb pet, available now through May 13.

That game is Adopt Me, which lets you raise a pet. It's been the most popular game in Roblox for ages, and is now the first game in the platform's history to reach a total of 20 billion visits.