Top 5 2021 Slot Machines
The first part of 2021 brought slot fans a steady stream of new releases, with notable titles arriving week after week.
Among the games released were Immortal Romance Mega Moolah from Microgaming, Stacked from Betsoft, and Kings Court Gem Splash from Playtech. Those are just a few examples. Did any of them earn a place among the top 5 2021 slot machines?
Here is our look at the titles we rated among the best slot machines at online casinos in 2021.
Gonzo’s Quest Megaways (Red Tiger)

The original Gonzo’s Quest video slot from NetEnt is widely regarded as a classic and ranks among the most popular games of its kind. Red Tiger reworked it with Megaways in 2021, a version some players may prefer. It can offer winning combinations across as many as 117.649 paylines.
Its layout uses 6x7 reels, with the Megaways mechanic varying the number of paylines on each spin. Each reel can show from 2 to 7 symbols. Gonzo’s Quest Megaways has a 96% RTP and high variance.
Starburst (NetEnt)

Nearly ten years after its debut, Starburst remains a fixture among well-known online slots. Made by NetEnt, it is a low-volatility game with a 96.09% RTP. Its features include expanding wilds and re-spins; the bright visuals catch the eye, while the play itself is what makes the game memorable.
When a wild symbol expands across a full reel, that reel stays locked and the others re-spin. This can create exciting win opportunities, particularly because Starburst pays in both directions.
Tiki Infinity Reels Megaways (Yggdrasil)

Tiki Infinity Reels Megaways had only recently arrived at online casinos when this review was written, yet it was already attracting attention. Anticipation followed the success of its sister title, Odin Infinity Reels X Megaways. The game blends the Megaways reel system with infinity reels, with a stated top payout potential of 10,000x the total stake.
Its medium variance and 96.07% RTP were described as industry-standard. Features to watch for include free spins, multipliers and a jackpot feature.
Age of Gods: God of Storms (Playtech)

The Age of Gods series is well known, and its God of Storms release offers another entry worth considering. This Greek-themed game has 5 reels, 25 paylines, a 96.15% RTP and low-to-medium variance.
This video slot makes a strong visual impression through its graphics and animation. Its features add further appeal: the Wild Wind Re-Spins feature and a progressive jackpot connected to a pooled network shared by over 20 video slots, along with a live dealer Age of the Gods roulette table linked to the jackpot.
Money Train 2 (Relax Gaming)

Money Train 2 is a high-volatility title with a stated top payout of 50,000x. The 40-payline game from Relax Gaming lists an RTP range of 96.4% to 98% and includes several bonus features.
Its bonus lineup includes re-spins, multipliers and a Money Cart round, where each symbol that lands has a special function. A Steampunk setting and detailed graphics complete the presentation.
Conclusion
One of these titles may suit your preferences. The original review rated all five as delivering a high-class online casino experience and argued that few slots could match the games listed here.
With 12+ years of experience in the iGaming industry, Evan specializes in reviewing online casinos, analyzing slot games, and evaluating player safety. Their expertise covers casino licensing, RTP, volatility, bonus conditions, and withdrawal policies. Through hands-on testing and independent research, Evan delivers transparent, fact-based reviews to help players better understand gambling platforms, their features, and potential risks.