The Green Machine Deluxe: Racking Up Riches (High 5 Games) - RTP 96%; Monopoly Lunar New Year (SG Digital) - RTP %; Mermaid's Fortune (AGS) - RTP My job for the past many years has involved writing the software that runs casino slot machines and their back end systems (player's club. . The 10 years old worldwide land-based hit comes again in a complete new gameplay mechanic! Based on Racking Up Riches, where same symbol clusters get formed. The 10 years old worldwide land-based hit comes again in a complete new gameplay mechanic! Based on Racking Up Riches, where same symbol clusters get formed. The Green Machine Deluxe: Racking Up Riches (High 5 Games) - RTP 96%; Monopoly Lunar New Year (SG Digital) - RTP %; Mermaid's Fortune. The Green Machine Deluxe: Racking Up Riches (High 5 Games) - RTP 96%; Monopoly Lunar New Year (SG Digital) - RTP %; Mermaid's Fortune (AGS) - RTP My job for the past many years has involved writing the software that runs casino slot machines and their back end systems (player's club.