There is a fine line between the casual gamer and the obsessive gamer — and HotSeat Chassis Inc. knows how to give the necessary push over that line. Take the HotSeat Flight Sim, for example, which helps distinguish the common flight-simulator fan from the true flying ace.

This $900 gaming chair, available online at www.hotseatinc.com, has a bucket seat bolted to a metal frame. The front of the chair has a mounting platform for display screens and allows you to attach a joystick or flight-stick controller for added realism. The seat comes in four colors — red, blue, yellow and black — and includes a 5.1-channel surround sound system with subwoofer.

Potential jet pilots can connect their PC or game console to the speakers, put an L.C.D. monitor on the front stand and sit down for a bit of action on the wing. The whole thing collapses for easy storage.

The Flight Sim is specially contoured to create the sensation of being strapped into a fighter jet. While you won’t get very far off the ground in this chair, a bit of imagination and a powerful PC can take you a long way.