Items that can be equipped before starting a mission, to grant various stat bonuses (or penalties), and special abilities. Each must either be purchased or found within various missions, usually well hidden. There are four slots for equipment, on the head, chest, arms, and legs respectively.
Tattered Rain Hat (Found) Sets the weather to rainy, making you able to catch certain fish. Also increases the frequency of bites, and the window of time needed to hook a fish.
CSIJ Level V Biosuit ($99,999) Armor: 40% - Places a fleshy filter over the screen, obscuring the UI and reducing visibility. Also, you can't talk to anybody while you wear the flesh suit, they'll immediately run away. Protects from Toxic Shock.[1]
CSIJ Level VI Golem Exosystem (Found) Armor: 40% - Sets Health to 200 - Instead of starting with weapons, you are placed in a mech with two arms capable of punching enemies. While in the mech you cannot kick.
Tactical Blast Shield ($6,000) Negates explosive damage. This allows for explosion jumping.
Load Bearing Vest ($1,200) Adds 1 extra magazines' worth of ammo to both of the weapons you spawn with.
Grappendix ($50,000) Sends out a grappling hook-esque organ that allows you to use momentum to grapple to and then swing from anything it can grab to.
Angular Advantage Tactical Munitions ($1,500) Allows bullets you fire to ricochet from surfaces, allowing you to hit multiple targets (sometimes inadvertently including yourself) with one shot.
Ammunition Gland ($10,000) Instead of reloading, ammo passively regenerates.
Vertical Entry Device ($7,000) Dramatically increased jump ability, high enough to clear fences.
Icaros Machine (Found) Extremely increased jump ability. Even jumping straight up and down will cause fall damage. Always jump to higher terrain or use in conjunction with the Bouncy Suit.