Slendytubbies II is a sequel of Slendytubbies. It was said to have happened 5 years after the original game. The main goal is the same, collect all the Teletubby custards while being hunted down by gruesome and monstrous versions of the classic Teletubbies you all know and love. With new maps, new monsters and a new multiplayer mode, Slendytubbies II expands on the terrifying premise of the original game that became a viral hit.

Slendytubbies II continues the story after the first 'Slendytubbies' game. 5 long years has past since the events of teletubby land. You, the white teletubby have been trying to figure out what happened. After 5 years of research on the teletubby custards you collect from teletubby land, you believe that the custards are genetically modified. You travel to teletubby land once again (which is now destroyed and swamp-like) to collect more custards for your research, only this time you find a secret entrance inside the teletubby house which leads to an unknown passage. You travel further into this passage and find some sort of secret layer full of unknown technology. More custards are inside this layer, you believe they are fresh and hold the truth and try to collect them for research. As you are doing so, you find hints that this layer genetically creates teletubbies and controls teletubby land. This explains the unknown speakers that instruct the old teletubby family what to do during the day. You begin to believe that tinky winky took a bad dose of the genetic teletubby custard. You fear that teletubbies are not born, they are made... and only to be hampsters in a cage. There is only one way to know for sure however, you must collect all the custards and find out the truth.