Real decentralized casino offers only limited games solely house games/original games only since 3rd party game providers such as Pragmatic, Evolution and many more usually require license to operate and can be only play via centralized casino.
Decentralized casino is really the best answer to this thread assuming the OP is not looking for 3rd party games that involves license.
Some CEX offer no KYC however, they have the right to ask KYC in case your account show some potential violation on ToS.
Well I say something, to enter a decentralized casino it is sought that they do not ask for the KYC, because if not, then such an effort does not make sense, it is a fact that things are like that, a decentralized casino that asks me for KYC then I leave, it does not make sense, the casino if it determines that I am violating the Tos, then it would leave me much worse, I who am a regular player, I would not have a single skill or anything like that, then I would have the worst of all experiences. I did not know that they had those restrictions, simply like that you cannot play.
A decentralized casino that still care much about their user adhering to any laid out forms of rules, and have even gone further to state out form of punishment for offenders isn't truly a decentralized casino.
A casino can not claim to be decentralized and then proceed to ask me for kyc verification when they accuse me of violation of their terms and conditions, what is terms and conditions even doing with a decentralized service in the first place?
Like I will always say, many casinos today claiming to be decentralized aren't decentralized, they are just using that word "decentralized" to capture users who do not understand or know what decentralized really is, and this is one of the areas gamblers really need to give themselves to knowledge to avoid being cheated with stuffs like this.