The bright lights of Vegas and other live casino locations will be back before we know it.  In the meantime, it’s important to keep a good eye on which are the luckiest slot machines paying out big time online Bitcoin Casinos.

Since the live slot community has been on a forced hiatus, many savvy players with a better win ratio are looking to see which games to play online.  One of the first questions these players ask is: What are the top online slots in 2021 rewarding the highest RTP?

If you haven’t guessed it by the article’s title, RTP stands for Return to Player.  If you’re looking for the technical definition, we’ve got you covered.  The Return to Player (RTP) is the amount of money a player is expected to win compared to the amount the player initially wagers.

We’ve dug deep and done our research to show you the top-performing slots in terms of the highest payout percentage in 2021.  These top-performing slots are also known as “loosest slots” in player slang, whereas slots that don’t return at these higher percentages are considered “tight slots”.

Jack Hammer 2

This slot is super entertaining with its crime and adventure theme, presented in a comic book style. There is a spin feature for free, where you get up to 20 free plays, where all wins get to be doubled, and extra wilds can randomly land on the reels. It has a player friendly RTP of 97.1%

1429 Unchartered Seas

Developed by Thunderkick, this video slot is just visually stunning. The traditional reels are replaced with a medieval aged hand-drawn map and the symbols include a variety of marine animals. There is an option for a free spin bonus where you can earn up to 50 free goes. It has an RTP of 98.6%, one of the maximum payouts you will find in a video slot, making it so popular.


Developed by NextGen too, it has a galactic background and a spacey and soothing soundtrack. Wilds in this are stacked onto the reels, increasing your winning chances. With every line win, you also have the option to gamble your winning to double or even quadruple it several times. The RTP of 97.87% makes Starmania a popular choice.

Keep in mind that finding land-based slots with the highest payout percentage is a moving target, but we here at will do our best to keep you informed at what’s hot each and every week by combing through our slots RTP database.  In the meantime, we suggest you to hit these three hot titles and maximize your profits while they’re hot and check out our vast game selection launching this summer!

Happy spinning!