Thornpass is a single-player tactical hex wargame. An armored Column of one main battle tank and three armored personnel carriers must run a mountain road from the northern entry to one of three southern exits. You command six hidden Ambusher teams, including two Viper anti-tank teams, springing from the forests and board edges to stop it, backed by landmines seeded along the route.
The Column is played by the AI under one of three doctrines that stays hidden until the debrief. Each turn you decide which teams to expose, roll your dice pool, and spend dice on movement and attacks. A session runs 10 to 20 minutes.