How the thirteen were chosen
We took the names that turn up most in Irish searches and in conversation — in the pub, on the group chat, under the football on a Saturday — and left out anything that only exists in a press release. Some are fifteen years old and still earning; some arrived with TikTok. A few are not offered by the casinos we cover at all, and they are here anyway, because you asked about them.
Every page gives the return to player the studio publishes, the volatility, the top prize, whether a free demo exists, and a plain estimate of what an evening costs at a sensible stake. None of them contains a system, because none works.
The shop-window classics
These are the games that were in the betting shop before they were on your phone. Simple reels, a feature you can explain in a sentence, and a theme that has not changed in years.
| Game | Studio | Why people keep coming back |
|---|---|---|
| Rainbow Riches | Barcrest | The leprechaun and the pots of gold: the pub and shop machine that went online |
| Fishin' Frenzy | Blueprint Gaming | The fisherman who reels in cash fish during free spins |
| Big Bass Bonanza | Reel Kingdom / Pragmatic Play | The same idea, rebuilt for a new generation and spun into dozens of sequels |
| Eye of Horus | Merkur heritage | Egyptian reels with symbols that upgrade during the feature |
| Book of Dead | Play'n GO | One expanding symbol and ten free spins, the template for a whole genre |
| Starburst | NetEnt | Low volatility, both-ways wins, and a pace that suits a small balance |
The new wave of slots
Cascading grids, multipliers that stack and prizes quoted in the tens of thousands of times the stake. They pay less often and more violently, so a budget has to be cut into smaller pieces. Gates of Olympus, Sweet Bonanza and Sugar Rush 1000 come from Pragmatic Play; Wanted Dead or a Wild from Hacksaw Gaming is harsher still. Read the volatility line on each page before you play them.
Seconds per round: crash games
Aviator is the one everyone has heard of: a multiplier climbs until the plane flies off, and you cash out before it does. The published return is high, but rounds last seconds, so the number of bets an hour is far higher than on any slot. Anybody selling you a 'predictor' for it is selling you a scam, and the page explains why.
Live game shows
Crazy Time and Lightning Roulette are Evolution productions, filmed in real studios and streamed around the clock. Their return depends on which bet you choose, which most players never check. For the tables themselves, our live casino guide goes deeper.
Who makes them
Behind each title sits a studio with a recognisable style. The profiles are on game providers: Pragmatic Play, Evolution, Play'n GO, NetEnt, Hacksaw Gaming, Nolimit City, Blueprint Gaming and Big Time Gaming. For how slots work in general, see online slots in Ireland; for the jackpot titles, jackpot slots.
Where to find this kind of game
We cover five casinos, on referral terms we state openly. We do not list their titles one by one — lobbies change weekly — so here is the kind of game each one leans towards.
Cas2Bet
100%CAS100
The largest lobby of the five, 4,579 games counted on 7 September, and 516 live tables for game-show fans.
CasinoPurple
100%PURPLE100
The same lobby as ZeSlots, with a plainer 100% offer and the shortest sign-up form.
Where the numbers come from
- Game information sheets published by each studio (return to player, volatility, maximum win).
- Casino catalogues counted on 7 September 2026; welcome codes checked active on 23 September 2026.
List compiled on 24 September 2026. Studios release several RTP versions of some games: the figure in the game's own help screen is the one that applies.
Frequently asked questions
What is the most popular online slot in Ireland?
There is no official chart. Big Bass Bonanza, Rainbow Riches, Fishin' Frenzy and Book of Dead come up most often among Irish players, with Gates of Olympus and Sweet Bonanza close behind.
Which popular game has the highest return to player?
On paper the crash and instant games: Aviator publishes 97%. Most of the slots on this list sit between 95% and 96.7%, and Rainbow Riches is at the lower end.
Can I play these games for free?
Most slots and Aviator have a demo mode with play money. Live game shows such as Crazy Time are filmed in real time and usually have no demo.
Are these games rigged?
Slot results come from a certified random number generator and live results from a physical wheel or table on camera. The published RTP is an average over millions of rounds, not a promise about your evening.