Dennis Nikrasch (September 12, 1941  2010), also known by the alias of Dennis McAndrew, was a Vegas slot cheater and a former locksmith who was responsible for spearheading the biggest casino theft in Las Vegas history, by grabbing $16,000,000 from rigging slot machines over a 22-year period.

In a typical slot tournament, players compete against each other to win large cash and/or FREEPLAY prizes by accumulating the most points during multiple rounds of tournament slot machine play. Participants are randomly assigned to slot tournament machines and are given unlimited spins for a preset amount of time.