Well, you can recommend your favorite game, and I will put it on OP if it's not too lousy
But for my personal pick is complicated as I have to pick the "evergreen" game, a game that I continue to play despite lucky or unlucky.
Anyways, some recommendation for the book of xxx mechanics lovers:
* Rise of Merlin - Play'nGo
* Mystery Museum - Push
* Book of Shadows - NoLimit
* Ancient Egypt Classic - Pragmatic
* Book of Gods - BTG
* Book of Tut - Pragmatic <- turn off the sound, lol