1, Clash of Clans (iPhone, iPad and iPad Mini): http://ios.appsgoer.com/clash-of-clans-review-8124.html
It is the best game on iOS platform. Most of the strategy games for Android, iOS and Facebook today are copying Clash of Clans.
2, Backyard Monster (Facebook, iPhone, iPad, iPad Mini) http://ios.appsgoer.com/backyard-mon...view-9589.html
Backyard Monster is one the earliest strategy game for Facebook that made a huge success. Even Clash of Clans are using the same formula with Backyard monster.
3, Clash of Lords (Android) http://www.dotmmo.com/clash-of-lords-19313.html
IGG's new Android game that is much similar to Castle Clash.
4, Steam Clans: https://play.google.com/store/apps/d...game.steamclan
5, Jungle Heat: http://forums.appsgoer.com/forumdisp...66-Jungle-Heat
6 Pocket Fort: http://ios.appsgoer.com/pocket-fort-hd-15958.html