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