Steel Commanders is a free card game on iOS and Android where you collect troops to do quests and battle other players. There are 3 different factions you can join; Pacifica, Agartha and Troy. You can use cards from any faction but cards from your own faction will give you bonus attack or defence.
Attacking other players will put your attack squad against their defence squad. If your attack score is higher than their defence score then you win the battle and get coins and honour points. Honour points increase your daily ranking, which can earn you prizes if you are ranked highly.
Card packs can be bought to strengthen your squad by spending minerals(bought with in app purchases) to get random, powerful cards with special abilities. However, these are quite expensive.
You can also battle against alien invasions with your Allies to get extra cards as rewards.
I recommend downloading Steel Commanders because it is a fun, interesting game which is free. It has good elements of strategy and is very good.
