i must admit i am addicted to Gems of War 
as @Jules and @geigerm already pointed out GoW is an everchanging, always evolving and regularly upgraded phenomenon.
i need my daily dose on my way to level 1000 (910 now).
btw we had a GoW Guild thread on āthe other siteā and should think about a restart here.
always a game of Brass running for me. just now in the Stately Play tourney [1st Stately Play Brass Tournament - #18 by JammaTal] (1st Stately Play Brass Tournament - #18 by JammaTal), but even games with strangers are ok for Brass. no quitters, a special community.
Sky Force Reloaded http://discourse.statelyplay.com/t/sky-force-reloaded-high-score-tournament-competition/57/36 has kept me busy and will do for a loong time coming.
Darkest Dungeon (playing on PS4. but might come to mobile too!) is an absolute blast! tough, unforgiving, old school feeling. heroes come, heroes go (fired or passed away).
Steamworld Heist. yeah! the long wait is over! woot!
shame on me, but iām still playing Boom Beach 
i never spent a single cent. one of the well done FTP games.
short before maxing out the buildings and troops.
anybody else? you could join our Task Force Fnorfenstein then 