Shiv Master is the two-level Survival upgrade that turns a clicker grab from instant death into a fight you can survive, as long as you carry a shiv. It is the most expensive Survival upgrade.
Without it, any clicker that reaches you ends the fight. Buy level 1 early if you play on the harder settings, and always keep a shiv crafted.
Crafting Speed
Cuts the time Joel takes to craft items from his backpack.
Healing Speed
Lets Joel apply health kits faster.
Listen Mode Distance
Widens the radius in which Listen Mode reveals enemies through walls.
Maximum Health
Raises Joel's maximum health. Buying a level while hurt also refills his health completely.