Sierra has not been inactive and announced the fourth pinball in the line of the 3D Ultra Pinballs: Nascar Racing. It's the usual Sierra product: mediocre at best. Again a three-table game, Garage, Track and Pitstop
They did slightly better with their next pinball: Thrillride. It is the usual mediocre quality, Sierra simulation. (After having published five pinball sets they were still unable improve their ball to something not polygonal-looking). However Thrillride was somewhat more fun than Nascar and Lost Continent.
In particular it had a "lights-out" mode
with a fireworks show which added somehow to the fun, if not the interest, of the game.
That was the last we heard from Sierra in the pinball scene.