Gadget shop offers a all-in-one Snowboard simulator game system for $59.95.

This snowboard simulator plugs into your TV and features four game modes (show-off, time challenge, pipedream, and Tokyo megaplex).
The game graphics are supposed to depict a wide variety of snowboarding terrain and objects, including slopes, moguls, jumps, half-pipes, alpine forests, mountain ranges, and other skiers and snowboarders.

For sport simulation games see also the cool Xavix system. Xavix has Tennis, Bowling or Baseball simulations.
The Living Room snowboard simulator runs on 4 AA batteries.
Buy it now on Hammacher.