Balloons crowd every edge of the screen, a ring of fairground bulbs runs around the reels, and a chocolate cake with three lit candles occupies the middle of the grid. Happy Birthday arrived from Eyecon in January 2017, weeks before Playtech confirmed its purchase of the studio, and the party dressing is the newest thing about it. Under the confetti, the game uses a 5×3, 25-line slot on numbers the studio has been shipping since 2003.
The demo states a return of 95.436%. It states no maximum anywhere, and the largest figure on the whole pay table belongs to the cake rather than to the party popper at the head of the ladder.
The Cake earns twice over. It pays from two symbols in any position, at 2x for a pair, 5x for three, 20x for four, and 450x for five in a row, and each of those figures is read against the whole wager rather than against one line. Three or more Cakes also open 15 Free Games, which inherit the line count and wager of the spin that started them and multiply every prize by three while they run. Retriggers are allowed up to 15 times. Only the highest Cake win joins the line wins on any given spin, so a screen carrying five candles collects that top figure once. The 450x is the largest number the help lists, and it belongs to the symbol that carries the feature.
Streamers, the rainbow party popper, is both the top symbol and the substitute. Only the Cake is outside its reach, and any line it helps complete pays double. On its own account, it returns 0.4x for two, 8x for three, 80x for four, and 380x for five in a row. That doubling is the reason to watch for it during standard play, since a line finished with the popper in it is worth twice what the same combination pays without it, and within the free round that doubling applies on top of the tripling. The popper appears often enough in the demo to read as ordinary furniture rather than as an event, which is how this build has always handled its wild.
Below the popper, the ladder is stocked with party objects, and two of them are borrowed. The purple hippo and the panda in a party hat are plush toys lifted from Fluffy Favourites and redrawn for the occasion, and they head the premium group at 38x for five in a row. Champagne follows at 18x, then the glasses and the heart balloons at 10x, with cupcakes, flowers, gift boxes, music notes, party hats, and blowers filling out the rest of the pay table. Six symbols pay from two, keeping small returns coming between features. A progressive companion, Happy Birthday Jackpot, followed in February 2018 and uses its own prize structure over the same party artwork.
A wall of balloons fills the backdrop; the reel frame is a red cabinet studded with lit bulbs, and every symbol is a glossy party object set against a flat blue window. Winning lines draw in thick gold, straight across the reels, which, on a 25-line board, is the clearest signal the shell gives. The bottom bar carries four controls and nothing else. There is no fanfare beyond Eyecon’s standard click and chime set, and the reels drop in the same order on every spin.
Free play shows the whole presentation within a minute because the artwork has one register and holds it. Nothing on screen explains the feature either. The Cake and the popper each get a panel in the help, where the numbers appear.
The 25 paylines are selectable rather than fixed, which dates this build as clearly as the artwork does. The bet panel splits the wager into a LINES figure and a BET PER LINE figure, each with its own pair of arrows, so the board can be cut back to a single line or run across all 25. MAX LINES and MAX BET are the shell’s only shortcuts, jumping both columns to the top in one tap. Line wins start at reel 1 and read rightwards, only the highest win on each selected line counts, and wins on separate lines are totalled.
The help states an RTP of 95.436%, and there is no second build for this title. Eyecon rates the game medium for volatility and medium for play, and nothing on the pay table argues for moving it off that tier. 25 lines with six symbols paying from two hand out small returns often and leave the range to the free round. Neither a minimum nor a maximum stake is stated on the shell. More of the studio’s classics are collected on our Eyecon games hub.
The pay table starts with the party blower and the party hat at 0.2x for three and 4x for five in a row, puts gifts and music notes on almost the same footing, then steps up through flowers and cupcakes at 5x for five in a row. Heart balloons and champagne glasses reach 10x, champagne 18x, and the hippo and panda 38x. Six rows start paying from a pair. The Cake row is the outlier at 450x for five in a row, ahead of the popper’s 380x, and it is the one row read against the total wager.
| Symbol | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| Party blower | – | 0.2x | 0.6x | 4x |
| Party hat | – | 0.2x | 0.6x | 4x |
| Gift box | – | 0.2x | 0.8x | 4x |
| Music note | – | 0.2x | 0.8x | 4x |
| Flowers | – | 0.4x | 1x | 5x |
| Cupcake | – | 0.4x | 1x | 5x |
| Heart balloons | 0.08x | 0.4x | 3x | 10x |
| Champagne glasses | 0.08x | 0.4x | 3x | 10x |
| Champagne | 0.08x | 0.8x | 4x | 18x |
| Panda | 0.08x | 1x | 6x | 38x |
| Hippo | 0.08x | 1x | 6x | 38x |
| Streamers (substitute) | 0.4x | 8x | 80x | 380x |
| Cake (scatter) | 2x | 5x | 20x | 450x |
A party skin, done properly, over a pay table that has been in service since 2003. The demo's 95.436% return and Eyecon's medium rating are what this build always offers, and the free round is where any range comes from. What lingers is the cake, both the largest figure on the pay table at 450x and the only route into the feature, which makes three of them a better sight than five party poppers. Worth a look on free play if the theme appeals. Otherwise, this is well-trodden Eyecon ground.
Set it beside almost anything else Eyecon built in that era, and the shape is familiar before anything has spun. Twenty-five lines, one substitute that doubles, one scatter that triggers, fifteen free games with every prize multiplied by three, retriggers capped at 15. The studio has shipped that arrangement under a long list of skins, and this is the one wearing party hats.
What sets it apart from the rest of the range is that it’s smaller than the artwork suggests, and it comes down to units. Line pays are quoted against the wager on one payline while Cake pays are quoted against the whole wager, so the popper’s five-symbol figure works out at 380x of what went in, and the Cake’s five-symbol figure stays at the 450x the help lists. The biggest number the game states belongs to a symbol a player is hoping to see three of, not five. No maximum is stated anywhere, and the help offers nothing that reads as one.
The free round is where the sums get briefly interesting. Fifteen spins with everything multiplied by three, a substitute doubling on top of that, and a retrigger allowance loose enough for the round to run long. It is also the only gear change on offer, and the Cake is slow to arrive. Three of them from anywhere sounds forgiving until you have watched the middle reels for a while without one. That stretch of flat spins is what the balloons are there to soften, and on free play it costs nothing to find out how long it runs.
As a party slot, the execution is tidy and entirely literal. The balloons are cheerful, the cake is well drawn, and the hippo and panda carry more personality than anything else on the reels, which is no surprise given where they came from. Our party-themed slots include a few that treat the occasion with more invention than this one does.
So, the review lands roughly where the January 2017 release notes would have put it. A player who wants this engine has better-looking skins to pick from, and a player who wants a birthday card on five reels gets a good one.
