In Zombination [free], players can either be humans or zombies. For zombies, players can spawn huge hoards and attack human settlements. The humans use weapons to defend against the hoards. This game can be played in teams and guilds can be made for raids. This game will be released for every other major platform later this year.
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Pros
Pro Massive world
This game takes place in a massive dynamic world with many different players. The maximum world size is still unclear.
Pro Lots of single player missions
World Zombination offers 50 different single player missions in addition to the online game.
Pro Huge armies
This game allows nearly 1000 units to be used at one time.
Pro Variety of units
In this game, units can be selected from 50 types, all with unique abilities and unlocks.
Cons
Con In app purchases
Users are given the option to buy various amounts of coins in the game. Fortunately, these purchases are only a way to make things move along faster, and aren't necessary for the natural progression of the game.