Semifinal Round B (four finalists from Round A, single elimination, head to head).

Semifinal Round A (eight players, head to head, in single-elimination match).

Semifinal wild card (one wild card player will be drawn from all non-advancing players).

Quarterfinal round (the top 140 scoring players in single-elimination play).

Qualifying rounds (head-to-head matches every 15 minutes).

A random number will be drawn from all numbers distributed tournament spots will be filled sequentially based on the number drawn.

All songs during the competition are played on 'medium' difficulty, with the semifinals and final round increased to the 'hard' difficulty level. The top three 'best dressed' rockers also will be rewarded with cash prizes. Every registered participant is guaranteed one match in the qualifying round and a free T-shirt. Club Mystic membership is free and can be completed the day of the event. Tournament participants must be at least 18 years old and be Club Mystic members. 'The 'Rock the Lake' tournament not only gives our guests the opportunity to win cash and prizes, but also the chance to rock out on the same stage as rock legends Kansas, Rick Springfield, the Doobie Brothers and Ringo Starr.' 'We are inviting anyone and everyone with an inner rock star to come out and compete in this free 'Guitar Hero' tournament,' said Bryan Prettyman, vice president of marketing for Mystic Lake Casino Hotel.

The rockers who advance to the final round of the tournament will compete in front of a live audience in the Mystic Showroom that night.

Participants will battle on 50 Guitar Hero stations set up in Mystic Lake Casino's Grand Ballroom. With more than $20,000 in cash and prizes, including $10,000 for the tournament champion, officials are preparing to host up to 2,500 competitors in this free-registration tournament.

Calling all rockers! Mystic Lake Casino Hotel will host Minnesota's largest 'Guitar Hero III' competition June 7.

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