Crafting Speed is a three-level Survival upgrade that shortens how long Joel spends building items in his backpack. Crafting happens in real time, so faster crafting means less exposure in the middle of a fight.
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.
Shiv Master
Level 1 lets Joel stab a clicker that grabs him if he has a shiv. Level 2 stops a full-durability shiv from breaking when used this way.