1 Left Alive is 4ThePlayer’s December 2019 zombie-themed video slot — not the Square Enix tactical game of the same year, but a 5-reel, 4-row video slot where the studio’s CEO Andrew Porter named a stated problem in conventional Ways slots and engineered the trademarked PLUS+WAYS™ math to solve it. The grid runs 1,024 single ways plus 32,768 PLUS+WAYS™ combinations — 33,792 total winning combinations per spin — at a published RTP of 97%, High volatility, bet range €/£/$ 0.10–100, and a maximum win of 4,140× stake. The free spins bonus introduces Bloody Wilds and pairs with 4ThePlayer’s signature Big Reel Portrait Mode™ for vertical mobile play.
4ThePlayer’s Second Slot and the PLUS+WAYS™ Origin
1 Left Alive launched on 16 December 2019 as the studio’s second-ever release, after 9k Yeti established 4ThePlayer’s UK-licensed boutique-studio identity (UKGC Licence 53858). The game shipped through SG Digital’s network — distinct from the Relax Gaming Silver Bullet route that 4ThePlayer’s wider catalogue uses for later titles like 1 2 3 Boom — illustrating the multi-platform distribution model the studio runs. Behind the launch sat a stated math problem Porter publicly named: conventional Ways slots could not accommodate a meaningful number of stacked or expanded wilds because the underlying combinatorial math broke down. Porter’s reply was to invent PLUS+WAYS™ as the explicit fix, and 1 Left Alive became the first slot to ship the mechanic.
How PLUS+WAYS™ Works
Standard Ways math evaluates one symbol set per reel column. On a 5-reel × 4-row grid, that produces 4 symbols per reel × 5 reels = 4^5 = 1,024 single ways to win. The problem Porter named: when an expanded or stacked wild lands, only one of its segments contributes to a Ways evaluation — the rest are mathematically wasted. PLUS+WAYS™ flips that. Each segment of an expanded wild and each individual symbol on a reel is evaluated as its own potential pay path, adding 32,768 combinations on top of the 1,024 single-ways base. The total geometry is 33,792 winning combinations per spin, and that summed figure is the design proof.
A concrete worked case: the lady survivor lands on two reels in expanded form (covering the full reel each time), and three Aces land on the remaining reels. The standard Ace 5-of-a-kind line pays at the Ace value — say 15 coins — using two 1×1 segments from the wilds. With PLUS+WAYS™, the remaining segments of the expanded wilds also pay 15 coins each as their own implied lines. A spin that would have returned a single 15-coin line in conventional Ways math now returns the line plus several segment-driven payouts. The 97% canonical RTP reflects the math expansion — placing 1 Left Alive among the highest-RTP games in the broader 4ThePlayer catalogue alongside crypto outliers like 100 Bit Dice (98.94%).
Bloody Wilds, Free Spins and Big Reel Portrait Mode
The Free Spins bonus triggers when three scatter symbols land simultaneously on reels 2, 3, and 4. During free spins, the lone survivor character “shoots” zombie symbols, transforming them into Bloody Wilds. The mechanic ties the theme directly to the math — a thematic action drives wild generation rather than an abstract RNG wild placement.
Bloody Wilds persist on reels for several spins after they form, accumulating across the bonus chain. The bonus is reactivatable up to a hard ceiling of 700 spins, and that cap is the math reason the 4,140× maximum win is reachable — without the long bonus chain, the Bloody Wild density would not accumulate enough to feed the published ceiling. The reactivation rule turns the free spins from a one-shot reward into a sustained chain event, which is why free spins and bonus rounds classifies the structure as a chain-driven bonus rather than a flat trigger-and-resolve.
4ThePlayer’s exclusive Big Reel Portrait Mode™ stacks the reels vertically and spins them right-to-left for portrait-orientation mobile play. Studio analytics from the 9k Yeti launch (cited by Porter at the 1 Left Alive release) showed higher-staking players actually preferring Big Reel Portrait over the standard portrait layout — meaning the mode is a deliberate first-class playing surface that the studio has rebuilt across the catalogue, not a mobile fallback.
Strategy Tips
Two practical decisions drive almost every session. First, choose the orientation that matches the device — Big Reel Portrait Mode is the studio-preferred mode for mobile and the data points to higher-stake players using it; landscape works for desktop. Second, size the bankroll for the bonus rather than the base game. The 4,140× maximum win is concentrated in the Bloody Wilds free spins where the 700-spin reactivation cap is the math budget. The 97% canonical RTP is well above industry average, but the High volatility profile means extended stretches between bonus triggers across the mid-vol-to-high-vol bracket of high-volatility games.
Our Verdict
1 Left Alive is the slot where 4ThePlayer first proved its math chops. PLUS+WAYS™ is a stated solution to a stated problem — Porter publicly named the “stacked wilds in Ways slots is mathematically impossible” frame and the 33,792 combinations per spin is the design proof. Bloody Wilds + 700-spin reactivation pair the math expansion with thematically-driven wild generation. Audience filter: the High volatility profile and bonus-concentrated max-win reward patient bankroll discipline. For the studio’s later math-innovation slot, see the studio’s later 1 2 3 Boom with its Slot Slider™ architecture; ready to commit real-money sessions, shortlist operators via our guide to casinos that carry 4ThePlayer titles.
