An untitled Henry Stickmin game is the upcoming sixth installment in Puffballs United's popular Henry Stickmin online game series, as well as the final game in the series.
Series' creator Puffballs United announced that a sixth installment was coming, on November 22, 2016 in a news post on Newgrounds. He revealed that the game will be "huge" and will take more than one year to come out. He also said that Ellie will return as a character. 
On January 4, 2017, he officially announced that he started working on the sixth game. He said that the game will be the final game in the Henry Stickmin series, and that it will be at least "3 times bigger than Fleeing the Complex". Unlike all the other games in the series, the sixth game will not be an online Flash game, instead it will likely be released on PC platform Steam along with remastered versions of all the other Henry Stickmin games, as part of the The Henry Stickmin Collection. 
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