Slingo Classic 20th Anniversary. Approval Date. Slingo Classic was developed to commemorate the 20th anniversary of the existence of slot-bingo games. Double Angels. Bust The Bank. . Slingo Starburst Xxxtreme Welcome offer 50% bonus up to £50 plus 20 spins on 9 Masks of Fire on 1st deposit. ACS. Slingo Fluffy Favourites, Slingo Rainbow Riches, and. Theme. ACS_ Slingo Classic 20th Anniversary by Slingo · Wild Space. ACS_ Dec ACS. Play for Free. Slingo Cascade 2. Manufacturer. THEME ID. Play for Mega Fire Blaze: 3 Wizards by Playtech · Divine 9.