Decent zombie themed match 3

This is a decent zombie-themed match 3 game, with a lot of items and leveling mechanics, as well as modes involving guilds (invasion mode, challenge mode) and rescue missions. The main storyline is decent, but after playing through to level 3, the level gap requires you to spend a lot of time grinding and replaying through earlier levels in order to progress. The amount of achievements and collectibles you can unlock is vast, and the upgrading mechanic for the weapons is interesting. I think I would rate this game higher, if not for 2 things: having to grind and repeat earlier levels (or buy upgrades and items?) in order to progress through the storyline, and a relatively high number of crashes (especially since Im on an iPhone 6).

marbelc about Kill Me Again : Infectors (Survival RPG)