The single player campaign should be lengthened and they should make a ground war mode where you can have 10+ people on co-op take on large waves of zombies
If you can't save your partner (pressing G not working) save the game,refresh page, then load your file/game and your partner will be alive.(unless exploded or when you try to leave room it doesn't say partner can be revived)
found amazazing! glitch go to inventory grab an item, while holding item go to options and click anywhere on the screen except where the words and stuff are and you absorb all its stats- can do this as many times you want + to keep this comment alive
i just looked at the leader board and saw peterson CZ's score and thought "how long did you play that-must have had 3 days of freetime score-368,287,372,011,766
if you go to inventory and pick up an item then go to options while still holding it and click then let go, that item's stats will be transfered to your character's stats
it's easy and fun and i got this awesome strategy that got me over 10.000 gold in caveman times on normal mode and got an army of dino riders that lasted until the present time.