Several months back when I first downloaded this game, it was actually not bad. It had a decent level system, but now, it just went from somewhat "pay-to-win" to completely full to the ****** brim of nonsense 100% pay to win. When I say this, Im talking about their SAS bucks that you can get, before this update, you could replay challenges and still get more bucks, but now its just play once and thats what you get (unless you play through the WHOLE challenge again). I could go paragraph after paragraph explaining how Kiwi Ninja just completely ruined this game.
Ganonpig about SAS: Zombie Assault 3, v3.10