7 Best Online Slots 2021 – Highest RTP Slots 2021CasinoHighlighted 7 best online slots, highest RTP slots in 2021. RTP is an acronym for Return to Player, and it is the most important factor to consider when selecting a slot machine. The house edge on online slot machines can vary greatly, and the lower the house edge, the better your odds of winning. A game’s return to player % is calculated over thousands of rounds, and the higher the RTP, the better the deal for the player.SlotRTP %Free SpinsPaylinesReelsRecommended CasinoJack Hammer 297.1010-209915King BillyDevil’s Delight97.60Yes205Get Slots1429 Uncharted Seas98.6025505BitstarzJackpot 600098.90No53Get SlotsBlood Suckers98.0010105King BillyRetro Reels Extreme Heat97.50Up to 20305BitstarzMega Joker99.00No53BitstarzHowever, such a RTP calculation cannot guarantee that by launching the game and spinning a few times, you will receive 96 percent of your money back. Don’t expect to start the game, spin 10 times, and receive exactly 96 percent of your bets back. Because the casino would lose money if the RTP was 100 percent, the RTP is never equal to 100 percent.The lower the house edge, the more likely you are to win.We hope you enjoyed perusing this list of the highest paying slot machines and that you will find something to fit your gaming preferences. Experienced players already know how and where to hunt for the highest RTP slots. But if you’re new to the game, click here to learn about the various sorts of casinos and games available.