Five paid modes at a glance
| Mode | Price (× base stake) | What it does | RTP |
|---|---|---|---|
| Ante Bet | 3x | Free Spins trigger five times as often | 96.44% |
| Super Spin 1 | 10x | At least one wild on every spin; Free Spins cannot trigger | 96.44% |
| Super Spin 2 | 200x | At least one wild on every spin, with better odds of extra wilds, bigger multipliers and longer expansions; Free Spins cannot trigger | 96.52% |
| Bonus buy | 100x | Starts a free-spins round; published descriptions differ on which one (see below) | 96.45% |
| Bonus buy | 500x | Starts Super Free Spins | 96.44% |
The base game with no option switched on runs at 96.52%, the same figure as Super Spin 2. All five options are chosen in the game before a spin, and the price is always a multiple of the stake, from 0.20 to 240.
Ante Bet (3x)
The Ante Bet triples the price of a spin and in return makes Free Spins five times as likely to trigger. At the published base frequency of about 1 in 248 spins, five times as often works out at roughly one trigger in 50 spins — an arithmetic estimate from the two published numbers, not a separate figure from the provider. Everything else about the spin stays as it is: the same 15 lines, the same paytable, the same wild behaviour. The price is 0.60 at the minimum stake and 720 at the maximum. The RTP is 96.44%, 0.08 points below the base game.
Super Spin 1 (10x)
Super Spin 1 costs 10x the stake and guarantees at least one masked-killer wild on every spin. Free Spins cannot trigger in this mode, so Scatters are decorative while it is on; the mode is a way to play the base-game wild — expansion and x2–x10 multipliers on a line — without waiting for one to land. The price is 2 at the minimum stake and 2,400 at the maximum. The RTP is 96.44%.
Super Spin 2 (200x)
Super Spin 2 costs 200x the stake. Like the first mode it guarantees at least one wild per spin, and on top of that it raises the odds of additional wilds, of the larger multipliers and of longer vertical expansions. Free Spins cannot trigger here either. The price is 40 at the minimum stake and 48,000 at the maximum, which makes it the most expensive option short of the 500x buy. The RTP is 96.52% — the same as the base game, and the highest of the five options.
Bonus buy at 100x
The 100x buy starts a free-spins round for 100 times the stake: 20 at the minimum, 24,000 at the maximum. What it starts is the one point on this page where the published descriptions of the game do not agree. One account says the buy awards the standard Free Spins; another says the game picks at random between Free Spins and Super Free Spins. The RTP, 96.45%, is the same in both accounts, and the game's own rules screen states which round is on offer. Either way the round follows the rules on the wilds and free spins page: sticky wilds, multipliers that multiply on a line, no retrigger.
Bonus buy at 500x
The 500x buy starts Super Free Spins directly, with the guaranteed three or more wilds on the first spin and the sticky grid from there. It costs 100 at the minimum stake and 120,000 at the maximum, five times the price of the 100x option. The RTP is 96.44%.
Which mode keeps the highest RTP
The spread across the whole table is 0.08 percentage points. The base game and Super Spin 2 sit at the top with 96.52%; the 100x buy follows at 96.45%; the Ante Bet, Super Spin 1 and the 500x buy share the bottom at 96.44%. In house-edge terms that is 3.48% at the top and 3.56% at the bottom — per 1,000 wagered, an expected return of 965.20 against 964.40. Those are long-run averages; the modes differ far more in how the money arrives than in how much of it comes back. Super Spin 2 keeps the base-game RTP while guaranteeing a wild every spin, the buys trade the wait for the bonus against a fixed price, and the Ante Bet sits in between. The volatility side of that trade is on the return to player page.
Where the bonus buy is not available
Players at operators holding a Great Britain licence see the game without its two buy options: since 31 October 2021 the UK Gambling Commission's rules on online slot design have ruled out feature purchases, so the 100x and 500x buys are switched off there. Elsewhere the game itself shows which of the five options the casino has switched on.
Questions
Can I buy the bonus in Killer Night?
Yes, at two prices. The 100x buy starts a free-spins round — published descriptions differ on whether it is always the standard Free Spins or a random pick between Free Spins and Super Free Spins — at an RTP of 96.45%. The 500x buy starts Super Free Spins at an RTP of 96.44%. Operators under a Great Britain licence run the game with both buys switched off.
What does the 100x bonus buy give in Killer Night?
A free-spins round for 100 times the stake, from 20 at the minimum bet to 24,000 at the maximum. Published descriptions of the game differ on the content: one says the buy awards the standard Free Spins, another says the game chooses at random between Free Spins and Super Free Spins. The RTP of the option, 96.45%, is the same in both, and the rules screen in the game states what is on offer.
Can Free Spins trigger during the Super Spin modes?
No. In both Super Spin 1 (10x) and Super Spin 2 (200x) the free-spins rounds are switched off; Scatters and the Super Scatter land but start nothing. The two modes are about the base-game wild — at least one guaranteed on every spin, with Super Spin 2 also raising the odds of extra wilds, higher multipliers and longer expansions.
Which Killer Night mode keeps the highest RTP?
The base game and Super Spin 2, both at 96.52%. The 100x bonus buy runs at 96.45%, and the Ante Bet, Super Spin 1 and the 500x bonus buy at 96.44%. The whole range is 0.08 percentage points wide, so the choice between modes changes how a session feels — guaranteed wilds, more frequent bonuses or an instant round — far more than it changes the long-run return.