Online slots come in many types: classic 3-reel machines, video slots, Megaways, jackpot games and slots with bonus buys, plus hundreds of themes from Vikings to candy. This page brings together every slot guide and game review on UltraGambler, so you can find the right type of slot, compare RTP and volatility, and read a fact-checked review before you play.
Where we play slots
1win is our top-rated casino (9.9/10), with thousands of slots and a crypto withdrawal that took 15 minutes in our test.
Play at 1win18+. T&Cs apply. Not available in every country. Game libraries vary, so search the lobby for slots.
Types of slots by how they play
The biggest difference between slots is the reel layout and how wins are formed. These guides explain each type and list the best games.
- Classic slots: retro 3-reel games with simple paylines and few features.
- 5-reel slots: the standard video slot format, with paylines, ways and how they compare to 3-reel games.
- Video slots: modern themed slots with free spins, wilds and bonus games.
- Megaways slots: reels that change size every spin, with up to 117,649 ways to win.
- 3D slots: slots with animated 3D graphics.
- Progressive jackpot slots: games where a share of every bet feeds a growing jackpot.
- Bonus buy slots: pay a fixed price to go straight into the bonus round, and where this is restricted.
- Drops & Wins slots: how Pragmatic Play’s network prize promotion works.
Slots by budget and RTP
RTP (return to player) is the share of all bets a slot pays back over the long run, and volatility describes how often and how big the wins tend to be. Start here if you care most about value or play on a small budget.
- Highest RTP slots: the best-paying slots ranked by return to player.
- Best real money slots: our top picks by RTP, volatility and max win.
- Penny slots: how low-stake slots work and how to make a small budget last.
- 1 cent slots: slots you can play from $0.01 a spin.
- Top Dollar and dollar slots: how IGT’s Top Dollar bonus works.
Slot themes
Many slots share a theme and similar features. Each of these guides compares the best games in one theme, with fact-checked RTPs and max wins.
Aztec slots · Candy slots · Egyptian and book slots · Fishing slots · Fruit slots · Viking slots · Wolf slots · Halloween slots · Christmas slots · Gaminator (Novomatic) slots · Rich Wilde and Cat Wilde slots
Slots by provider
Slot game reviews A to Z
Our reviews cover the provider, RTP, volatility, max win and how each game’s features work.
- Bars and Bells
- Big Bad Wolf
- Big Bad Wolf Megaways
- Big Bass Bonanza
- Big Bass Bonanza Megaways
- Big Bass Halloween
- Big Bass Splash
- Bigger Bass Bonanza
- Blood Suckers
- Bonanza Megaways
- Bones & Bounty
- Book of Dead
- Book of Ra
- Buffalo King
- Buffalo King Megaways
- Cash Eruption
- Christmas Carol Megaways
- Dead or Alive 2
- Deadwood
- Devil’s Lock
- Divine Fortune
- The Dog House
- The Dog House Megaways
- Dolphin’s Pearl Deluxe
- Dragon Palace
- Elvis Frog in Vegas
- Fire Joker
- Fruit Party
- Gates of Olympus
- Gates of Olympus 1000
- Gold Blitz
- Gold Rush Frog
- Gonzo’s Quest
- Great Rhino
- Great Rhino Megaways
- Howling for Gold
- Immortal Romance
- Jammin’ Jars
- John Hunter and the Aztec Treasure
- Legacy of Dead
- Lord of the Ocean
- Lucky 88
- Lucky Lady’s Charm Deluxe
- Madame Destiny
- Madame Destiny Megaways
- Mega Joker
- Mega Moolah
- Mental
- Money Train
- Money Train 2
- Razor Shark
- Reactoonz
- Rise of Olympus
- The Ruby
- Sizzling Hot Deluxe
- Starburst
- Starlight Princess
- Starlight Princess 1000
- Sugar Rush
- Sugar Rush 1000
- Sweet Bonanza
- Sweet Bonanza 1000
- Thunderstruck II
- Twin Spin
- Viking Runecraft
- Vikings Go Berzerk
- Wanted Dead or a Wild
- Wild West Gold
- Wolf Gold
- Zeus vs Hades: Gods of War
Learn how slots work
- How to win at slots: what actually helps, and what doesn’t.
- Slot machine myths vs reality: seven common myths debunked.
- Provably fair games: what they are and how to verify a result.
- How to verify provably fair slots: a step-by-step guide.
- Crypto casino no deposit bonus: how no-deposit offers work and the terms to check.
- Responsible gambling: limit-setting tools and where to get support.
How to choose a slot
- Check the RTP version: many games come in several RTP versions, so open the info screen before you play.
- Match volatility to your budget: high volatility slots can go a long time without a big win; lower volatility games pay smaller amounts more often.
- Try the demo: most slots have a free demo mode, so you can learn the features first.
- Set limits: decide on a budget and a time limit before you start.
Where to play slots online
Our top-rated casino is 1win (9.9/10), with thousands of slots and a crypto withdrawal that took 15 minutes in our test; new players can use promo code Ultragambler (see our 1win promo code page). iWild (9.8/10) has a 7,000+ game library. Compare more options in our online casino reviews. Game libraries vary by country.
Types of slots FAQs
What are the main types of slots?
Classic 3-reel slots, 5-reel video slots, Megaways slots, progressive jackpot slots and bonus buy slots. Within those types, games are also grouped by theme, such as Egyptian, Viking or candy slots.
Which type of slot pays the most?
No type pays more on its own. What matters is each game’s RTP and volatility. See our highest RTP slots guide for the best-paying games.
What is the difference between video slots and classic slots?
Classic slots usually have 3 reels, a few paylines and few features. Video slots usually have 5 or more reels, many paylines or ways, and bonus features like free spins.
Are all slot types available everywhere?
No. Game libraries vary by country and casino, and some features, such as bonus buys, are restricted in some countries.
Important: check your local laws before you play
Online gambling laws differ from country to country, and in some places it is restricted or not permitted at all. Check that online gambling is legal where you live and that the casino accepts players from your country. You must be 18 or older (or the legal gambling age in your country, if higher). Only gamble with money you can afford to lose.
