You can check out stake.com is reliable and trusted currently we have some reputable users who running their Sig campaign meaning if there is no transparency it would have been rated by those users so i believe you should try out the site and experience more of their features. Secondly i would love you to also take a good look at these gambling site Fortunejack Duelbits Rollbit Roobet.
Op is looking for a casino that has no lots of games combine, I think the website you've mentioned have variety of games they are offering.
I don't like a casino that combines so many games that os way I prefer to play only slots-based casinos. Please make your recommendation.
I don't know also if there's a casino that purely focus on slots, I guess most casinos are competing so they are offering a wide variety of games, some casinos even have a sports betting as well just to compete.
Most casino sites especially those that have good reputations don't focus on a single game but they promote multiple games where players could choose freely. I don't know any reputable site that offers and focuses on slots only. If there will be an available site that offers a single game, it's important to check its reputation and trust rate. Multiple games attract multiple players so which isnimportsnt, especially for huge gambling sites.