Solar Disc Slot – Free Demo
Provider:
IGT
The disc does not hand you a wild — it names a symbol already sitting on the six reels and turns every copy of it wild at once, which makes one disc worth eight positions on a good board and two on a bad one.
Play Solar Disc demo
The disc does not add a wild. It picks one.
Almost every slot with a special symbol works by addition: the thing lands, and you are one wild better off than you were. Solar Disc works by conversion. When a disc lands anywhere on the six reels it turns over and names a symbol — puma, bear, vase, mask, key or coin — and then every instance of that symbol already sitting on the board becomes wild at once. The disc does not bring anything with it. It decides which of the symbols you already have are about to change sides.
The consequence is that two identical discs are worth wildly different amounts. Land one on a board holding eight keys and eight positions light up. Land one where the same symbol appears twice and you have bought two wilds and a nice animation. The rules add a further constraint most players never notice: a disc can only name a symbol that is actually on the reels and has not already been named by another disc on the same spin. When there is nothing left to convert, extra discs simply become wilds themselves.
Your free spins are priced before they begin
This is the part worth knowing before you play, and it is stated plainly in the rules and almost nowhere else. The bonus needs one Bonus symbol on reel one plus at least one disc anywhere else. You get ten free spins — and on every one of those spins, a disc is guaranteed on each reel where a disc appeared in the triggering spin. Trigger with one disc and you have bought ten spins with one guaranteed conversion apiece. Trigger with three and every spin of the round starts with three. There is no retrigger, so whatever the triggering spin looked like is the shape of the entire bonus.
Mine triggered narrow. The disc came back on the sixth reel each time, dutifully, and for eight spins it converted very little — the round was sitting at 0.15 after two spins and had not troubled the balance by the ninth.
And then the ninth spin
On spin nine the disc named a symbol that happened to be everywhere. Ten positions across the first four reels turned over together, the round total went from almost nothing to 21.00, and the whole thing was over one spin later. That is fourteen times the stake out of a round that had produced a rounding error up to that point, and it is the clearest demonstration I have of why this mechanic is worth the wait: the payout is not decided by how many discs you get, but by what the board happens to be holding when one arrives.
Our Minty Verdict: A quiet, well-built 2018 IGT machine whose entire character sits in one unusual idea. The 500× ceiling is the lowest of any game I have covered here, and the rules show exactly where it comes from: fill all twenty-four positions with wilds and the Pattern Win pays 25,000 against a 50-coin stake, which is 500× and not a coin more. Judge it accordingly — this is a game about frequent modest conversions, not about a number at the end of a rainbow. Watch how many discs are on the triggering spin; that single detail is worth more than anything else on the screen.
A clause with nothing to attach to
One footnote for anyone who reads payback statements, because I do. Solar Disc carries the same line IGT puts on its other machines: the expected 96.01% "is also based upon correct player choices for any games which involve main game and/or bonus game play strategy". On a game like Lucky Larry's Lobstermania 2, where a bonus round asks you to accept or reject an offer, that sentence is doing real work. Here there is nothing to choose. No picker, no gamble, no decision of any kind from the first spin to the last. The clause has travelled from the Lucky Larry's Lobstermania 2 rulebook to this one and arrived somewhere it means nothing at all — which is a small reminder to read what these documents actually say rather than assuming the boilerplate is boilerplate.
How it went
Sixteen minutes at 1.50 a spin from a 200.00 start. The base game took me down to 158 and change before the bonus landed, and the ninth free spin put the session back over the line: 214.55 on the counter at the end, up 16.05 on the machine's own reckoning. That is a good session for a game with this ceiling, and precisely the sort of result the low top end is designed to produce more often than the alternative.
