Maybe this could be of help. This does not cover all games producers, but still...
Playngo: up to 6 RTP Variants between 99% – 84%
Pragmatic Play: almost all games up to 5 RTP Variants between 96% – 87%.
Red Tiger: almost all games up to 5 RTP Variants between 98% – 90%
Nolimit City: almost all games 2 RTP Variants: 96% & 94%
Spinomenal: almost all games 4 RTP Variants 96% – 89%
Habanero: almost all games up to 4 RTP Variants between 98% – 92%
Swintt: almost all games 2 RTP Variants: 95% – 92%
isoftBet: almost all games 2 RTP Variants: 96% & 92%
Push Gaming: several games 2 RTP Variants: 96% & 95%
Netent: many games up to 8 RTP Variants between 99% – 90%
Microgaming: several games 3 RTP Variants: 96% – 92%
Blueprint: a few games 2 RTP Variants: 96% & 94%
Quickspin: a few Games 3 RTP Variants between 96% – 90%
Thunderkick: One game 2 RTP Variants: 96% & % 94%
ELK: Can't be adjusted
Yggdrasil: Can't be adjusted
That's a very interesting and accurate list but how did you find those figures? It's something you've found yourself by playing at different casinos, or it comes from private datas for professional only? It's very surprising to learn there are providers offering up to 8 RTP variants. I guessed it was 2 or 3 variants at most. Playngo: up to 6 RTP Variants between 99% – 84%
Pragmatic Play: almost all games up to 5 RTP Variants between 96% – 87%.
Red Tiger: almost all games up to 5 RTP Variants between 98% – 90%
Nolimit City: almost all games 2 RTP Variants: 96% & 94%
Spinomenal: almost all games 4 RTP Variants 96% – 89%
Habanero: almost all games up to 4 RTP Variants between 98% – 92%
Swintt: almost all games 2 RTP Variants: 95% – 92%
isoftBet: almost all games 2 RTP Variants: 96% & 92%
Push Gaming: several games 2 RTP Variants: 96% & 95%
Netent: many games up to 8 RTP Variants between 99% – 90%
Microgaming: several games 3 RTP Variants: 96% – 92%
Blueprint: a few games 2 RTP Variants: 96% & 94%
Quickspin: a few Games 3 RTP Variants between 96% – 90%
Thunderkick: One game 2 RTP Variants: 96% & % 94%
ELK: Can't be adjusted
Yggdrasil: Can't be adjusted
You have no data for Hacksaw and OneTouch btw? Because ultraBTC has posted a list of providers offering only one single RTP above and those two providers don't appear there either.
No - there are software providers with a fix RTP for every slot/casino game. But many of them offer multiple RTP versions.
Some of the providers that actually have ONE fix RTP version of the game(s) are:
Big Time Gaming
Relax Gaming
YGGDRASIL
Elk Studios
Iron Dog Studios
Nextgen Gaming
Kalamba Games
Some of the providers that actually have ONE fix RTP version of the game(s) are:
Big Time Gaming
Relax Gaming
YGGDRASIL
Elk Studios
Iron Dog Studios
Nextgen Gaming
Kalamba Games
I am a retired gambling professional and also gamble myself, so both
A lot of info I know, but there quite a few casinos that publish the info like this. Google Coolbet, that's a fiat casino, in their casino section they have an RTP calculator where they cover those things and to my experience that info is correct. Btw, in many cases it is not 100% of games that are adjustable, but rather some, though usually the list is quite long. No idea about Hacksaw and and Onetouch unfortunately. Just a guess, I'd say those guys have no way to adjust RTP, but that's not for sure. Onetouch is a sister company to Bitcasino.io and these guys have rather been transparent for many years. Hacksaw for long time catered their games via Relax and Relaxs does not allow to adjust RTP. Now they are going direct integrations as well, so I am not entirely sure.