Approval Date. Manufacturer. Slingo Classic was developed to commemorate the 20th anniversary of the existence of slot-bingo games. THEME ID. . ACS_ Dec ACS. Theme. Slingo Cascade 2. 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. ACS_ Slingo Classic 20th Anniversary by Slingo · Wild Space. Play for Free. ACS. Slingo Fluffy Favourites, Slingo Rainbow Riches, and. Play for Mega Fire Blaze: 3 Wizards by Playtech · Divine 9. Bust The Bank. Double Angels.