Stellar Portals Slot Review

Stellar Portals Slot Big Image

Stellar Portals is available as an exclusive title at Microgaming casinos, and it’s a slot machine which was designed by Snowborn Games. Taking us to space, in the vicinity of portals which appear to get us through black holes into unexplored regions of space, the game has the right idea, but I can’t say that the implementation works out quite as I wanted. A modern slot machine, but not very interesting visually, it more than makes up for that by relying on a very long list of interesting features.

You are going to get 5x3 reels, along with the usual 20 lines which will often be available for such setups. Rewards of up to 7,777x the stake are on the table, and while not easy to trigger, the possibility is there. With a 96.04% RTP and high volatility, Stellar Portals looks like a game for veterans. When features trigger, there are a lot of different variants that could come along, including several versions of free spins, respins, multipliers, sticky and regular wilds.

Stellar Portals Betting and Prizes

$0.20 is the least you can invest in a single spin of Stellar Portals slot. At the other end, the highest bet value available can reach $20. Given the presence of 20 lines, you are looking at line bets of up to $1 for each one.

The potential for this game is to pay up to 1,500x the stake during its regular spins, and as much as 7,777x during free spins. For the former, you just need a screen filled with top symbols and/or wilds, as each combo pays 75x the stake. For the latter, you also need multipliers, something that’s available with several versions of the free spins.

Volatility is expected to be high in any game which will pay this much, and it’s true for Stellar Portals as well. Luckily, the developer made sure to keep the RTP fair, at 96.04%.

Slot Features

About the most common option available to you, the Wild symbol will just act as a substitute when landing, provided that it doesn’t appear enough times on a line to pay you directly. Its own rewards reach 75x the stake, the highest possible per line in this game.

Sticky Wilds are also available, also as substitutes and top paying symbols. Additionally, these will stick to their positions and trigger respins. For as long as new sticky wilds appear, these respins continue.

A lot of the slot’s other features will be coming via dedicated scatters, which are required to land on the reels 1, 3 and 5. Each type of free spin has its own scatter that is needed on those three reels, which makes them a bit more difficult to trigger than expected (four types of scatters for the same three reels). These features can’t be retriggered:

  • Multiplier Bonus: it awards 6 to 9 free spins, where 5x multipliers get applied to all wins.
  • Rising Multiplier Bonus: rather than a fixed multiplier, this version of the free spins will take the multiplier up at each stage. A total of 6 free spins are triggered, with the 1st one getting a 2x multiplier, the 2nd a 3x one, the 3rd at 4x, 4th at 5x, 5th at 8x and the 6th one at 10x.
  • Stacked Wild Bonus: it gives you a random number of free spins, between 6 and 9 rounds, where you will find stacked wilds on all reels. Creating new wins is easier, but there are no multipliers here.
  • Sticky Wild Bonus: with 6 free spins offered, it will keep all sticky wilds in their landing positions, until the feature is over. Unfortunately, the ability to trigger respins is removed from the sticky wilds, for this feature.

Theme & Design

Going to outer space is a dream for many, and it can be fun even if it has to be in a slot machine. It needs to be done right when you’re targeting people’s love for space and science fiction though, and I don’t feel like Stellar Portals is doing the theme justice. Mostly, you’re looking at images of space in the background, while on the reels it’s a mix of black hole portals with pretty lights around them, as well as various blobs of light.

Four symbols with colored blobs are of low value, while four portals featuring black holes surrounding by four different main colors are the high value icons. About four different types of logos as scatters, plus two others for regular and sticky wilds, complete that list.


Stellar Portals slot game could be a decent choice for the players that are into space themed slots and want a small chance at landing a big payout. I wouldn’t expect great odds from this one, as the volatility is higher, but it’s not an unfair game. Best of all, there are a lot of different features that could trigger, from regular and sticky wilds, to respins, several free spins, multipliers and more. You don’t get bored easily with Stellar Portals, and that’s definitely a plus.

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