Crystal Odyssey is a super simple, jewel-themed slot from Novomatic. It’s a 4 reel, 10 payline game that comes with stacked wilds and a bonus feature that awards up to 300 free spins with frozen wilds. Stakes start at 40p, rising to a maximum of £100 per spin.

Some of Novomatic’s gem-themed slots been pretty underwhelming (we’re looking at you Dazzling Diamonds) so our hopes weren’t particularly high when we fired up Crystal Odyssey.

The visuals here are certainly a step up. Set against a star-filled backdrop, the reels include 7 jewel symbols. They’re bright and sharp and a big improvement on the aforementioned Dazzling Diamonds. The 1 symbol you’ll be hoping to see is the white diamond. Land 4 of these on a payline and the cashier will be boosted by a bumper payout that’s equal to 500 times your total stake.

It’s worth noting here that winning lines can be created from both right to left as well as left to right. There are only 3, 4-in-a-row paylines so they’re something of a rarity.

On reel 4 you’ll see a multi-coloured crystal formation – this is the game’s wild. As per usual, it replaces everything bar the scatter. It can land fully stacked to turn the whole reel wild. If you land the wild and it doesn’t lead to a payout, it will be held and you’ll be awarded a re-spin and a second chance of landing a winner.

Crystal Odyssey comes with a Free Games feature – to trigger it, you’ll need to land 3 or 4 of the Crystal Odyssey logo anywhere on the reels on the same spin. You’ll then receive 10 or 20 free spins. The stacked crystal wild is locked in position throughout the feature round.

It can substitute for the scatter during the free spins too, making it a little easier to re-trigger the bonus and grab an extra 10 or 20 free spins. You can retrigger quite a number of times with a maximum of 300 free spins up for grabs.

We were pleasantly surprised by what we saw in Crystal Odyssey – sure, there aren’t many features on offer. The free spins round is decent enough though thanks to the ever-present stacked wild. The visuals have a welcome HD sheen and even the usual backing track has received a space-age upgrade.

The action here is basic. If you like a variety of bonus features and plenty of extras, then look elsewhere. In fact, Crystal Odyssey plays a bit like a classic fruity, albeit 1 with a futuristic look. If that recipe of glossy design and simple gameplay appeals, then these jewels are worth a look. Alternatively, NetEnt’s Starburst is recommended.