Mahsung Deluxe (Steam key/Region free).

http://store.steampowered.com/app/542690/
Mahsung Deluxe is a unique blend of mahjong, concentration and puzzle solving cleverly combined into a single great game with 50 mind-bending challenges. Your task is to remove all tiles from the board by pairing up similar tiles. Tile matches are only possible if a line can interconnect both tiles using no more than 3 segments (2 corners). A straight line can remove neighboring tiles that match. Wall-tiles are obstacles and part of the environment. On trickier levels, some tile images are hidden behind a “?” symbol and needs to be flipped and memorized for a correct match.