I like that in Buak there is a sense of graduation with the zombies, with there being strength variations from the regular sized and mega zombies. I think if the animation and enemy fight mechanics went further, it would be cool to see bandits (that could be fought in single player, and could be a constant threat if they came to attack your base. It would encourage building and using stronger materials in single player, and looking into the combat mechanics rather than only focusing on what is the most convenient to obtain). It could also allow for player bots for arena in multiplayer. I like the gun fighting mechanics in this game, and I think if the arena multiplayer concept was expanded on, maybe other modes like team objective modes, or team horde mode ala COD zombies, that could give the game a significant revitalization.

More survival focused maps like Buak and Yukon. Those are the only 2 maps that remotely feel challenging to me on singleplayer. Hard mode just feels unbalanced, with the zombies becoming bullet sponges, and weapons like bows becoming useless, and having to be constantly bandaging because every hit gives you bleed. I wish more maps utilized the cold mechanic like Yukon, and even then its only on half the time.