Free Spins Pay

Hello i am building a simple slot game with free spins bonus feature. I have trouble calculating the payout of the free spins in case that each free spin can retrigger additional ones. Could you give me some intuition on how to proceed, because i ant to include it in the hit statistics

Probably the first thing you can do to make it easier is set a cap for the maximum number of free spins.

I also struggled with that. I just used simulation to average it.

It’s pretty easy once you get a handle on it.

Let’s say you start with 10 spins and you can retrigger 3 different ways:
1. 3 scatters, probability = 0.02, extra games = 5
2. 4 scatters, probability = 0.01, extra games = 10
3. 5 scatters, probability = 0.003, extra games = 20

So, from each initial game, you expect to retrigger 0.02*5 + 0.01*10 + 0.003*20 = 0.26 games

The total is an infinite series, which is easily calculated as:
10/(1-0.26) = 13.51

Thanks, i was struggling to calculate the pay amount of each FS, not the average number of FS itself :) Turned out it was pretty simple
RTP_FS * Average Number of FS :))