In 2021, some of the best slot machines to play included "Mega Moolah," known for its life-changing jackpots, and "Gonzo's Quest," celebrated for its innovative avalanche feature and engaging graphics. "Starburst" remained a favorite for its simplicity and vibrant visuals, while "Book of Dead" captivated players with its adventurous theme and high volatility. Additionally, "Divine Fortune" offered a blend of mythology and progressive jackpots, making it a top choice. These slots not only provided thrilling gameplay but also featured enticing bonuses and immersive experiences, appealing to both new and seasoned players alike.