Here2Win Casino · Greentube · Australia
Rainbow King card on Boomerang Pokies
Australian punters can open the session page for Rainbow King pokie apart from this catalogue.
Greentube released Rainbow King as a medium-to-high volatility pokie, and Boomerang Pokies files it for Here2Win Casino players in Australia. Published return is 95.00%. The figure does not owe anyone a payout.
What this pokie is
Boomerang Pokies sends you out and back: read Rainbow King here, play it at Here2Win Casino, return to the same URL if you want the figures again. The pokie itself does not boomerang a loss into a win.
Rainbow King is the Greentube pokie Boomerang Pokies writes up for punters who open it at Here2Win Casino. Nothing on this page is a second RTP invented for Australia.
the Gold Coast does not change the reel strip of Rainbow King. City is not a setting in the game. Boomerang Pokies only keeps the written facts beside the name.
The studio behind it
If you only needed the maker, it is Greentube. Here2Win Casino does not rebadge the game. The provider page is the clean list.
Fortune Fishing shares a studio with this card, and so does Pots of Treasure Win Ways. Both are Greentube.
Studio certification & mechanics
Greentube (Novomatic AG Group) is an iGaming studio founded in 1998 and headquartered in Vienna, Austria. Its random number generators (RNG) and math models are audited by GLI, eCOGRA, TÜV Austria and certified across MGA, UKGC, AGCO (Ontario), ADM, DGOJ, GGL. Studio RTP policy: Standardised theoretical RTP profiles (~95.00%–95.50% classic mathematical model).
In the Boomerang Pokies catalogue, Greentube accounts for 419 pokies, playable at Here2Win Casino. Across the 135 titles with a published return, the studio averages 95.05% RTP (spanning 92.13% to 96.45%, with 0 pokies at 96.5% or above). Signature studio mechanics include Book-style Expanding Scatter, Lock & Spin, Twin Spinner, Gamble Ladder.
Technical layout for Rainbow King: 5×3 / 5×4 HTML5 video grid paired with Standard studio payline / ways structure, running natively in HTML5 across desktop, iOS, and Android browsers at Here2Win Casino.
Expanding Symbols: Expanding symbol mechanics select one or more pay symbols that stretch vertically to cover the full reel when enough instances land.
Gamble Feature: The Gamble feature offers an optional post-win double-up or risk ladder round after standard base-game payouts.
At Here2Win Casino
Here2Win Casino is the casino on this card. Beside Rainbow King the provider page lists 419 other Greentube pokies, all played at Here2Win Casino.
Published figures & technical specs
- Studio
- Greentube (419 in this catalogue)
- Published RTP
- 95.00%
- RTP band
- under 96%
- Volatility
- medium-to-high
- Features
- Expanding Symbols and Gamble Feature
- House edge
- 5.00%
- Vs studio avg RTP
- -0.05% vs 95.05% avg (#88/135)
- Reel grid
- 5×3 / 5×4 HTML5 video grid
- Pay structure
- Standard studio payline / ways structure
- RNG testing labs
- GLI, eCOGRA, TÜV Austria
- Studio licences
- MGA, UKGC, AGCO (Ontario), ADM, DGOJ, GGL
- Platform
- HTML5 (Desktop, iOS & Android)
- Play at
- Here2Win Casino
- Stake
- A$
- Card updated
- 2026-10-29
Session math & RTP benchmark
At a published RTP of 95.00%, the theoretical house edge on Rainbow King is 5.00% over a long-run sample. Across 135 RTP-published Greentube titles in this catalogue, the studio average is 95.05%, placing Rainbow King at -0.05 percentage points (rank #88 of 135). Against the wider catalogue average of 95.80%, the delta is -0.80%. For real-money play at Here2Win Casino in A$, a practical bankroll buffer for this volatility tier is 200x–250x your base spin stake.
| Session volume | Total turnover | Theoretical return | House margin | Est. winning spins |
|---|---|---|---|---|
| 100 spins (A$1/spin) | A$100 | A$95.00 | A$5.00 | ~27–33 |
| 250 spins (A$1/spin) | A$250 | A$237.50 | A$12.50 | ~68–83 |
| 500 spins (A$1/spin) | A$500 | A$475.00 | A$25.00 | ~135–165 |
Pros and cons
Pros
- Greentube is on the card, not buried in a lobby.
- The play button stays on boomerangpokies.com and then opens Here2Win Casino.
- Published RTP is printed as 95.00%.
- You can see the medium-to-high volatility pace before you stake.
Cons
- Boomerang Pokies does not pay a win and does not take a deposit.
- No bonus figure is printed. Any offer sits inside Here2Win Casino and can change.
- How often a spin returns something is not on this card.
How this pokie compares
| Title | Studio | Published RTP | RTP delta | Volatility | Grid |
|---|---|---|---|---|---|
| Rainbow King (this card) | Greentube | 95.00% | — | medium-to-high | 5×3 / 5×4 HTML5 video grid |
| Jingle Jackpot · Highest RTP in Greentube | Greentube | 96.45% | +1.45% | medium | 5×3 / 5×4 HTML5 video grid |
| Book of Bonanza · Same mechanic (Expanding Symbols) | SmartSoft | 97.60% | +2.60% | medium-to-high | 5×3 classic video grid |
Explore head-to-head comparisons → · Session bankroll calculator →
More from Greentube
Who it suits
A medium-to-high volatility pokie sits in the middle of the pack for pace. Rainbow King is an ordinary session game at Here2Win Casino, not a system.
How a session behaves
Coming back to Rainbow King later does not make it due. Keep the A$ stake where you left the rule.
A fair session on Rainbow King is a run of spins you can afford to lose, not a plan to clear a welcome offer. Boomerang Pokies does not print a bonus figure it does not hold.
Questions
Does Here2Win Casino list Rainbow King for Australian punters?
Yes. Boomerang Pokies links Rainbow King to Here2Win Casino for Australian players. The button on this page stays on boomerangpokies.com and then opens the pokie at Here2Win Casino.
What is the RTP of Rainbow King?
The published RTP of Rainbow King is 95.00%. That is a long-run studio figure. A single session in the Gold Coast can finish far from it.
How volatile is Rainbow King?
The card says medium-to-high volatility. That describes the spread of results, not how often a feature 'should' hit on a Tuesday night.
Which studio built Rainbow King?
Greentube is the studio named on the Rainbow King card. Boomerang Pokies groups the rest of that studio on the provider page.
Is this page the casino, or a catalogue?
Boomerang Pokies is a catalogue. The stake in A$ is placed at Here2Win Casino after you follow the play button. This page does not hold a balance.
Can I open Rainbow King on a phone?
Punters in the Gold Coast mostly open Rainbow King from a phone. Boomerang Pokies does not ship a separate app. The button hands the pokie to Here2Win Casino.
Is Rainbow King staked in A$?
You choose the A$ stake after Here2Win Casino loads Rainbow King. This catalogue page never takes the money.
Can I try Rainbow King here without an account?
No. Boomerang Pokies does not embed a demo of Rainbow King. The button opens the pokie at Here2Win Casino. Any practice mode, if one exists, is inside that account, not on boomerangpokies.com.
Does Boomerang Pokies score Rainbow King?
No score is printed on purpose. A star would be a house opinion. The page sticks to the studio, the published RTP when the card has one, and the volatility label.
Does Rainbow King remember my last session?
Nothing on this page is a timer for a feature. If the last session went badly, the next one does not owe you the difference.
How old do I have to be to play Rainbow King?
18+. Boomerang Pokies is a catalogue, and Here2Win Casino is where the session runs. Do not open the pokie if you are under 18.
Where does the click on Rainbow King go?
The click stays on boomerangpokies.com first, then opens Rainbow King at Here2Win Casino. The partner address is not printed in the article.
Where are the other Greentube games?
Boomerang Pokies lists 419 pokies from Greentube for Australia. Rainbow King is one of them. The provider page holds the rest.
Is Rainbow King different in another Australian city?
No. the Gold Coast is named because readers are there. It is not a setting inside Rainbow King, and it does not change the RTP.
Will I see a bonus figure for Rainbow King here?
No figure is invented here. If Here2Win Casino shows a welcome offer, it shows it inside the account, with its own terms. Read them there before you opt in.
Is Rainbow King a club or pub pokie?
No. Rainbow King on Boomerang Pokies is an online pokie opened at Here2Win Casino. It is not a machine on a club floor and it does not carry a local sticker.
When should I close Rainbow King?
Set an A$ limit and a clock before the first spin, then close the game when either one is reached. Rainbow King will not close itself.
Why does Rainbow King have a pros and cons list?
It splits what the card publishes from what Boomerang Pokies refuses to invent. A printed RTP is listed because it is a source figure. A missing hit rate is named as a limit, not filled in.
Which part of the Rainbow King page is the preview?
The preview is the same card, shortened. It is not a tip and it does not know how your session in the Gold Coast will finish.
Will a shorter name still open Rainbow King?
This page is only Rainbow King. The play button follows that name, not a shorter guess.
What is the maximum win on Rainbow King?
A count of free spins and a bonus-buy price are also absent. Those numbers stay off the page.
Which feature labels are on Rainbow King?
Expanding Symbols and Gamble Feature is the whole feature list for Rainbow King. A label is not a price and not a description of the round.
Stake and the cashier
Leaving for Here2Win Casino is the payment step. Boomerang Pokies does not hold a POLi or PayID balance in between.
The A$ stake is chosen inside Rainbow King at Here2Win Casino. A catalogue can name PayID and still not run PayID.
How you open it
- Open Rainbow King from the play button. The click stays on boomerangpokies.com, then Here2Win Casino loads the pokie.
- Set the stake in A$ before the reels move. A smaller stake just makes a medium-to-high volatility pokie last longer.
- Stop on a clock you set in the Gold Coast, not when the pokie 'looks due'.
Filed under
Features Expanding Symbols Gamble Feature
Playing this pokie
Open the full name Rainbow King in the Here2Win Casino lobby. A shorter search can load a different Greentube title.
The card does not publish a maximum win, a reel count, a payline count, a count of free spins, or a bonus-buy price. Boomerang Pokies leaves those fields empty.
Australian punters play this pokie in the browser at Here2Win Casino, stake in A$. No app is installed from Boomerang Pokies.
Feature labels on this card: Expanding Symbols and Gamble Feature. Boomerang Pokies does not add a jackpot figure or a bonus amount on top of those names.