doesn't need to be complex, can be for any platform, including iOS.Mine is like a Japanese MMORPG mixed with mount and blade and total war.
5 classes as of yet:
Samurai: Heavy armor melee
Archer: Medium armor ranged
Sage: Light armor magic
Courtesan: No armor support and can have many more units
Shinobi: Light armor debuff and blast damage
You can get units to follow you depending on your lord, whom gives them to you and you can hire or capture them as well. Units, instead of being a ranged or melee unit, are specialized so they are like a Swordsman but suck with everything else, or can only use a Hanbo (cane).
Your lord also gives you bonuses/penalties. For example (btw this is based on legit japanese history) if you have Oda Nobunduga (spelling?), you get bonuses to swordmanship but penalties to certain defense.
Also staying true to Japanese tradition, you can have a banner after you reach a certain amount of fame. This gives your units and yourself certain passive buffs, such as accuracy or health buffs.
You can level up like an MMO, and levels give you, if you are Samurai for example... Okay so if you a Level 2 Samurai, you get a bonus to say heavy armor and a power attack that is placed in the kidney, causing severe damage (for your level) and hindering the opponent attack.
If you want more I can list some more stuff
Anyway, make your own game and post plz
