once you receive enough attribute points in a category your character will learn new skills.
strength:
5. build barriers (must have hammers, nails, and wood to build a barrier)
7:wield sludge hammers as weapons
12: carry backpacks with several weapons and one weapon in hand.
intelligence:
8. receive tips on where zombies are located
12: receive tips on where weapons are located.
18: receive tips on how to survive (get out of a tough situation)
stamina:
5: run for a mile without getting tired
7: stay awake longer (characters will need to sleep and will be vulurable while doing so.
12: move faster. (this will help make things that come down to luck be more in your favor)