Online slot games are by far the most popular of all online casino games, reportedly contributing up to 85% of the market share of the industry. Mobile casino lobbies are crowded with thousands of different slot titles, but there are a few classics that just keep staying at the top of the list.
In addition, gaming studios are rolling out sharper math, bolder worlds, and feature sets with optimum mobile functionality. These and other updates keep gaming enjoyable and relevant, ensuring that our top 5 of 2025 are very unlikely to be dethroned any time soon.
- Great Rhino Megaways
Way back in 2018, Great Rhino introduced the brand on a 5×3, 20-line chassis with stacked rhinos, a Stampede Respin, and a free-spins mode where rhino symbols act as wilds. The game quickly became one of Pragmatic Play’s most recognisable “safari” titles.
In 2020, Pragmatic Play partnered with Megaways, and the game we love today was released as Pragmatic Play’s first Megaways title. Fast forward to today, and you’ll still get to play Great Rhino Megaways now. The iconic slots have an RTP of approximately 96.5-96.58% and 20,000× top win on neutral databases and featured in “popular Megaways” roundups.
What keeps the brand new is its pace. Tumbles create momentum, while scatters keep the bonus unpredictable. Free spins let you choose your risk profile, so that every session feels tailored. Even with modest bets, you can still feel progress as those tumbles stack. Whatever risk profile you choose, the feedback loop is honest. You see what you are chasing, you understand how you got there, and you never feel lost in a maze of rules.
- Money Train 4
Money Train 4 was dropped in late 2023, the finale in the famous breakout Western/ steampunk franchise from Relax Gaming, originally launched in 2019. The success of the popular 5 x 4, 40 fixed line, high-volatility title is largely attributed to the “Money Cart” bonus feature that quickly became the series’ signature.
The Money Cart bonus is the heartbeat of the franchise, designed as a hold-and-win style feature with synergistic modifiers like Payer, Collector, Sniper, Necromancer, with “Persistent” variants. This explosive sandbox of modifiers can collide in surprising ways.
The thrill of Money Train is in its escalation. One upgrade becomes two, and quickly your board starts to feel unstoppable. On the Money Train, you are never watching a slow countdown – you are engineering a heist.
- Gates of Olympus
Some slots earn evergreen status because they can teach you the stakes in seconds. The real hook of Gates of Olympus is control. You immediately feel comfortable taking a few more spins because you always know what you are waiting for. You spin, symbols tumble, and Zeus drops multipliers.
Other than the appeal of the stakes and the association with the well-known mythology of a predictable ancient Greek world, Gates of Olympus is also a beautiful subject for streaming. Another reason why it continues to trend year after year. The rhythm in tumbles and surprise boosters offers natural chapter points for clips and replays. The soundtrack and camera shake sell every thunderclap, further pulling you in.
- Book of Dead: From Zeus to Ra and the world of explorer Rich Wilde
Released in 2016, Play’n GO’s Book of Dead, like Gates of Olympus, is another game that teaches new players what a slot can offer in a few spins. It remains a widely played slot thanks to its clear expanding-symbol ‘book’ bonus mechanics and high-volatility excitement.
Expanding symbols turns a routine bonus into a story you can tell, and that is why veterans keep coming back. In a year of wild experiments, Book of Dead remains a firm favourite and proves that elegance still wins.
- Sceptre of Anubis
Anubis is a modern take on the “book” type games. It respects the genre’s roots while fixing the usual lull and repetition of classic clones.
Quickspin’s new-era Egypt is moodier and much more deliberate than Book of Dead. The reels feel weighty, and the features of this slot game are revealed in layers instead of setting off fireworks on the first spin. And this slower burn pays off when the bonus unlocks.
The art direction on this slot also deserves a special mention. Don’t expect postcard sand dunes. Instead, you walk into an underworld lit by emerald glow, and this sets a tone that helps longer sessions feel more atmospheric and not so repetitive.
