Crab War is described as 'Mutate, Multiply and Unleash the Swarm!' and is a Clicking Game in the Games category. There are more than 25 games similar to Crab War for a variety of platforms, including Android, iPhone, Android Tablet, Online / Web-based and iPad. The best alternative is Cookie Clicker, which is free. Other Crab War like games are A Dark Room (Free, Open Source), War Clicks (Free), Idle Miner Tycoon (Free) and Bee Factory (Freemium).
WarClicks puts a military themed spin on the traditional idle clicker game and brings a new dimension to this particular genre. You take charge of an army, and it is your duty to train troops and buy upgrades to ready your men for battle.