Explore Giant Big City and transform into a massive twin boss.

This playful character grows to enormous proportions, becoming a towering goliath in the yellow sibling jumper game. Capable of leveling cities and becoming the universe's heaviest in the thrilling Rainbow Friends universe, they manipulate reality itself. Fast food treats like burgers, chicken sandwiches, and sweets litter Ragdoll Town's Naughty Rainbow Friends district. While Mama tends to infants in care games, this cunning food-obsessed titan outsmarts rivals in the clever Legend Food Game. Navigate destructive environments while evading dangers.

Spend your oil currency on power-ups and unleash catastrophic abilities to crush everything in your path!

The more you consume, the mightier you become. Devour burgers, donuts—even entire crowds! This is Fat Twin Sibling!

Sibling rivals battle fiercely to achieve maximum size.

Consume everything in sight and claim the title of fattest siblings.

What's New in the Latest Version 1.4

Last updated on Sep 1, 2024

Minor bug fixes and performance enhancements. Install or update now to experience the improvements!