Oh heck, even one of Alex Trebek's short-lived shows was built entirely around slowing the game down. It was called Pitfall, and contestants would answer questions while standing on elevators. Really quite an elaborate set. The goal was to cross the bridge to the other side by answering correctly. If they were wrong, the elevator would lower and they'd get a chance at another question to raise it, and if they got that wrong they were done. It was also a game show that infamously stiffed Trebek out of his paycheck when the company behind it went bankrupt. Monty Hall's version of Let's Make a Deal was run by the same campany and Hall had sued them leading to bankrupcy. As a result, none of the contestants received what they had won, and Trebek never received his paycheck. Two years later, Trebek would become Jeopardy's new host.