4 stars: It's not perfect, but this is the easiet and most user-friendly FTP mobile game that I've experienced, thus far. There's fair resource acquisition and the progression and leveling works evenly with each other. I want to say my only issue is the re-roll system for the arena isn't calculating that well, but that's the most minor of caviats for there to be for me.
5 stars: very engaging game with a nice variety of game modes. Updated edit: What would really take this game to the next level would be combo specials... for both the zombies and the heroes. That would be amazing... devastating combo specials based on factions. That would also coincide with a characters role either support tank etc etc
3 stars: It's an okay game, not unique at all, but is graphically decent and it doesn't have any major bugs. However, I've hit the paywall and can't advance. Team is maxed at 100 and i can't beat the challenge stages anymore. And because you can't ascend w/o a dupilcate unit to fuse with and because the epic gacha drop rate is less than 1%, good luck getting anywhere.
5 stars: Probably my favourite mobile game currently. Plenty of variety in what you can do. Mixes up levels. Good level up system and generous rewards. I've not had to pay a penny and have now been playing daily since launch. \ud83d\udc4d Updated review: it would be good if you could te visit chapter's on a hard difficulty and have new rewards for this to help progress through the normal chapters.
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