Blood Suckers is one of the oldest slots still in regular rotation at online casinos, and the reason is simple: its 98% RTP is among the highest of any slot ever released. NetEnt launched it in 2009 with a vampire horror theme, low volatility, and a 45% hit frequency that keeps sessions moving.
The game runs on a 5-reel, 3-row grid with 25 paylines. Between the tripled free spins wins and a pick-and-click bonus game, it delivers frequent small-to-medium payouts rather than rare large ones. The maximum win is 900x your stake - low by modern standards, but consistent with what a 98% RTP low-volatility slot is designed to do.
How It Plays
Twenty-five fixed paylines across a standard 5x3 grid. Bets range from 0.25 to 50 per spin. With a 45% hit frequency, nearly every other spin returns something. Most of those wins are below your stake amount, but they keep the balance from draining in the way higher-volatility games tend to.
The wild symbol is a vampire bite close-up with its own animation sequence. It substitutes for all symbols except the scatter and the bonus symbol, and it also pays on its own as the highest-value regular symbol. The base game is busy - you'll see frequent wild appearances and small line wins ticking over on most spins.
Scatter Symbols and Free Spins
The scatter is a blood-red book symbol. Landing two or more anywhere on the reels pays a multiplier of your total bet according to the paytable. Three or more scatters activate 10 free spins.
There's a built-in tension mechanic when two scatters land: the remaining reels accelerate through a suspenseful spin sequence before revealing whether a third scatter appears. It's a small touch but it breaks up the rhythm nicely.
During free spins, three or more scatters appearing again will retrigger the round with another 10 spins. The critical detail is that all wins during free spins - both bet line wins and scatter payouts - are multiplied by 3x. That tripling is where Blood Suckers' best payouts come from. A decent run of free spins with a few wild-assisted line wins can produce returns well above what the base game typically offers.
Vampire Slaying Bonus Game
Three or more bonus symbols appearing consecutively from left to right on an active payline trigger the Vampire Slaying bonus. This is a pick-and-click mini-game set in a crypt.
You're presented with a row of coffins. Click one to open it. If there's a vampire inside, you stake it and collect a coin reward. If a bat flies out, the bonus round ends and your accumulated total is added to your main game balance.
The bonus game adds a different kind of payout channel from the free spins. It's entirely luck-based - there's no strategy to which coffin you pick - but it provides medium-sized payouts that supplement the regular line wins. Landing both the free spins and a bonus game trigger in the same session is where Blood Suckers performs at its best.
RTP, Volatility and Session Character
The 98% RTP is the headline number and it's genuine. Over an extended session, Blood Suckers returns more of your wagered money than virtually any other slot available. The 2% house edge is roughly half of what most modern slots carry.
Volatility is rated low at 2.7 out of 10. Combined with the 45% hit frequency, this means sessions tend to be long and flat. Your balance will fluctuate gently rather than swinging between peaks and troughs. You're unlikely to multiply your starting bankroll by 10x in a single session, but you're equally unlikely to lose it all in 50 spins.
The 900x maximum win reflects this design. Blood Suckers is not built for chasing a big payout. It's built for playing time. Players who want to wager through a deposit bonus or play for an extended period without heavy losses gravitate toward it precisely because the maths favour survival.
Why Blood Suckers Still Gets Played
Blood Suckers was released in 2009 and the graphics show their age - the vampire theme uses a dark palette that looks dated next to modern horror slots. NetEnt released Blood Suckers 2 in 2017 with updated visuals, but the sequel has a lower RTP (96.94%) and never matched the original's popularity.
The original endures because the numbers are hard to argue with. A 98% RTP with low volatility creates a specific kind of value: consistent, extended gameplay with minimal bankroll erosion. Casino bonus hunters frequently choose Blood Suckers for clearing wagering requirements because the high return rate and low variance reduce the risk of busting before the requirement is met.
For players who treat slots as entertainment with a session budget, Blood Suckers offers more playing time per pound than almost any alternative. The gothic theme and bonus game add enough variety to hold interest, but it's the maths model that earns it a permanent spot on casino game shelves.
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