There are new computer games released every single month, but some people get obsessed with certain titles, and keep playing them for decades.

This is the case with Marcel Vos, who loves Roller Coaster Tycoon 2 so much he’s still playing it 17 years after it was first released (in 2002).

Not only is Vos still playing Roller Coaster Tycoon 2, he’s creating record-breaking rides that would take years to ride if they existed in the real world.

In this video he explains the logic behind his greatest creation, “Wild Mouse,” which would take 12 years to ride. Partly because it travels at 1 km per hour!