How many movies have Markiplier and Robert Muyskens acted in together?

They have worked on 4 movies together! Their first movie together was Markiplier's Tour: THE MOVIE (2018) while their highest rated movie together was In Space with Markiplier (2022). They have not worked together since In Space with Markiplier: Part 2 (2022). They are most known for their comedy films together.