TMNT are coming to Session: Skate Sim! Show off your skateboarding skills in a brand new map : The Swamps from the legendary Teenage Mutant Turtles. The TMNT update is free and available now on Session: Skate Sim. TMNT are coming to Session: Skate Sim! Show off your skateboarding skills in a brand new map : The Swamps from the legendary Teenage Mutant Turtles. The TMNT update is free and available now on Session: Skate Sim.