Thief

Thief is a NetEnt slot released on 23 January 2013. It runs on 5 reels, 3 rows, and 25 fixed paylines, with an RTP of 96.7% - above average for a slot of its era. The theme is a cartoon-style night heist: a female burglar working her way through a rainy cityscape armed with spy gadgets. Bets run from £0.25 to £125 per spin, and the dual free spins system gives it genuine replay value beyond what most 2013 slots still manage to offer.

RTP and Volatility

The RTP is 96.7%, which sits comfortably above the 95-96% you see on many comparable slots. Volatility is medium - you pick up regular smaller wins in the base game, with bigger swings reserved for the bonus rounds. The max win is 68,550 coins. At £125 per spin that is a significant top prize, but Thief is not a jackpot slot and the math model rewards consistent play over chasing a single massive hit.

Compared to other NetEnt titles, Thief sits between the low-volatility comfort of Starburst and the higher-variance grind of Secrets of Atlantis. It suits players who want meaningful bonus features without extreme dry spells between triggers.

Expanding Wilds

The burglar herself is the wild symbol. She appears on reels 2, 3, and 4 only, and expands to cover the full reel when she lands as part of a winning combination - she does not expand on non-winning spins. With three reels potentially going wild simultaneously, the expanding wild mechanic is the main source of large base-game wins. It fires frequently enough to keep base-game play engaging between bonus triggers.

Dual Free Spins System

The standout feature is two separate free spins modes, each triggered by a different scatter symbol. Both scatter types land only on reels 3, 4, and 5.

Standard Free Spins: Landing 3 or more blue tunnel scatters on reels 3-5 awards 10 free spins. The blue scatter remains active during the round, so retriggering is possible. The expanding wild mechanic carries over, making this a solid round even if it is the lower-value of the two modes.

Adrenaline Free Spins: Landing 3 orange Adrenaline Scatters on reels 3-5 triggers 10 Adrenaline Free Spins. This mode strips the reels down to high-value symbols only - tool icons, Adrenaline Scatters, and the exclusive Diamond symbol. The Diamond pays up to 5,000 coins for five on a line and does not appear anywhere outside this mode. Max wins in Adrenaline mode can reach 50,000 coins.

A third outcome exists: landing a mix of blue and orange scatters across reels 3-5 triggers a combination round of 10 free spins. The combination round uses the standard free spins reel set rather than the stripped-down Adrenaline configuration, but the trigger still counts as an Adrenaline activation for retrigger purposes. Every spin where reels 3-5 light up carries genuine anticipation about which mode you are heading into.

Symbols and Paytable

High-value symbols are all heist-themed: a grapple gun, night-vision goggles, a green laser canister, and a spy watch. For five of a kind on a 25-line max bet, these pay between 6x and 20x your total stake. Low-value symbols are standard playing cards from 10 to Ace, paying 2x to 4x for five of a kind. The Diamond symbol is exclusive to Adrenaline Free Spins - it does not appear in the base game at all, which is an unusual and effective design choice that makes the Adrenaline round feel genuinely different rather than just being a reskin of the standard feature.

Design and Playability

Thief was originally built in Flash. The desktop version now runs as HTML5 at most casinos. The visual style is cartoon rather than cinematic: dark blue and purple tones, a rain-soaked background animation, and a clean layout that keeps symbol legibility high. NetEnt included a quickspin option and full game history tracking, both standard for their catalogue of this period.

On mobile, the HTML5 version performs well on Android and iOS. The 5x3 grid scales cleanly to smaller screens and touch controls are responsive in both portrait and landscape orientation. There is no dedicated app required - it loads directly in the mobile browser.

How Thief Compares to Other NetEnt Slots

Thief launched in the same era as Jack and the Beanstalk and Gonzo's Quest, both of which have stronger visual production values and more complex bonus structures. Thief holds its own because the dual bonus concept was ahead of its time in 2013, and the 96.7% RTP has aged well against modern competition.

Against newer NetEnt releases like Finn and the Swirly Spin and Piggy Riches, Thief is more stripped back - no cascading reels, no cluster pays, no bonus buy option. What it offers is a focused mechanic that delivers two meaningfully different bonus modes without overcomplicating the experience. Jack Hammer and Twin Spin are the closest comparable alternatives from the same period, and all three remain regularly available at online casinos carrying the full NetEnt catalogue.

Verdict

Thief is a mid-range NetEnt slot with a genuinely useful dual free spins mechanic and a competitive 96.7% RTP. It is not a high-volatility thrill ride - the max win of 68,550 coins is modest by current standards - but the medium math model delivers consistent session length and the Adrenaline Free Spins round provides a clear peak for big wins within that framework. For players who enjoy NetEnt's classic catalogue without needing the complexity of modern game engines, Thief remains a worthwhile session choice at most casinos carrying the full NetEnt library. It has been running continuously since January 2013 with no announced retirement date.

Where to Play Thief

These online casinos carry NetEnt games including Thief. Read our Donbet review or browse all casino reviews.

Thief RTP and Variance

Thief has an RTP of 96.07%, which is above average. See our highest RTP slots for the best returning games. Medium volatility offers a balanced mix of win frequency and payout size.

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