Birthday Time is a single skin offer released for a limited time in mid July 2020. The skin, Concentrated, could only be acquired after purchasing both Deal 1 and Deal 2. It was not available for individual purchase. There may be few opportunities to acquire this skin in the future.
Note: The Birthday Time offer celebrates the 5th anniversary of when Miniclip purchased Agar.io from the original creator Matheus Valadares. This offer is similar to Agar.io Birthday from previous years.
Details of this offer can vary depending on location, platform or time.