May 22 - Puffballs confirms the sixth game's title as "Completing the Mission", as well as confirming that characters such as Charles Calvin would be making a return.
December 12 - Puffballs confirms that the sixth game's acronym will be "CtM", also revealing part of a screenshot of Completing the Mission.
THE HENRY STICKMIN COLLECTION PLATFORMS SERIES
January 4 - Puffballs announces that he has started work on the sixth game, stating that it might be the final installment in the series and that it will "be 3x as big as Fleeing the Complex." He also confirms that it will not be a free online Flash game, and will instead be released on Steam alongside remade versions of all the previous Henry Stickmin games as part of The Henry Stickmin Collection.Puffballs also states that Ellie Rose will make a return. November 22 - PuffballsUnited announces the sixth installment of the Henry Stickmin games on Newgrounds, stating that it will be "huge" and take more than a year to come out.