Great game: quite long and sometimes a bit of a challenge (i didn't finis it yet). However a few flaws are to be stressed out:
1/ I am French and use a AZERTY keyboard. Game developpers should understand that swiching between AZERTY and QWERTY is a bit of a pain in the glutes...
2/ Please proofreed.
3/ Please go into details; ok, little leager unlocks kick ass and master but what the hell does it changes?
4/ Being able to change the graphics quality would be good for old computers (with for instance the capacity to remove the killed corpses or such)
5/ The loots are totally random. I played the game on two different computers. In one game i struggled to find "basic" crafting items (wooden planks, iron, ...) but found "advanced items" (orichalcum casing, enhanced batteries, lightning molecule,...) and on the other, i only find crappy items. There should be a way to adapt the loots to the gameplay
6/ Why can't i drink potions when i'm on a mission?
7/ When zombies burst out of a door/window, it should ne be when you change floor RIGHT after the game loaded (hell yeah, instant slaughter)
8/ Why does the sister looks like about 14 in the artworks and is a kid during the game?
9/ Feqw bugs here and there (i couldn't complete a mission for whatever reason even if i both killed all zombies and looted everything i could)
10/ Why is the shop so crappy? A few potions, ammos and crafting kits? It makes the related skills quite useless
11/ Maybe a "reset talents" option would be good (something like Dr Cow where you'd pay an expensive price) because your needs may change along the game or you may screw up.
I know it's quite a long list but i enjoyed the game and i thought it still deserves to be improved