| Accordion Can be recycled into crafting materials. | Recyclable | |
| Adrenaline Shot A serum that fully restores stamina and temporarily increases stamina regeneration | Consumable | |
| Advanced ARC Powercell Very valuable resource that drops from certain ARC enemies | Misc | |
| Advanced Electrical Components Used to craft utility items and shield mods. Can be recycled into crafting materials. Used to craft: Raider Hatch Key, Photoelectric Cloak | Refined Material | |
| Advanced Electrical Components Recipe Lets you craft a Advanced Electrical Component | Recipe | |
| Advanced Mechanical Components Mostly used to craft advanced weapons. Can be recycled into crafting materials. | Advanced Material | |
| Advanced Mechanical Components Recipe Lets you craft an Advanced Mechanical Components | Recipe | |
| Agave A piece of an agave leaf. Can be used to regain a small amount of health. | Consumable | |
| Agave Juice A concoction that temporarily increases stamina regeneration, at a small initial cost to health. | Consumable | |
| Air Freshener A scented air freshener, barely fragrant. | Valuable | |
| Alarm Clock Can be recycled into crafting materials. | Recyclable | |
| Angled Grip I Slightly reduces horizontal recoil. | Modification | |
| Angled Grip II Moderately reduces horizontal recoil. | Modification | |
| Angled Grip III Significantly reduces horizontal recoil. | Modification | |
| Angled Grip III Recipe Lets you craft a Angled Grip III | Recipe | |
| Angled Grip II Recipe Lets you craft an Angled Grip II | Recipe | |
| Antiseptic Used to craft medical supplies. Can be recycled into chemicals. | Refined Material | |
| Anvil I Single-action hand cannon with high damage output and headshot damage, but slow handling. | Weapon | |
| Anvil II Single-action hand cannon with high damage output and headshot damage, but slow handling. | Weapon | |
| Anvil III Single-action hand cannon with high damage output and headshot damage, but slow handling. | Weapon | |
| Anvil IV Single-action hand cannon with high damage output and headshot damage, but slow handling. | Weapon | |
| Anvil Recipe Lets you craft a Anvil | Recipe | |
| Anvil Splitter Tech mod for the Anvil that replaces its bullets with ones that split into 4 weaker projectiles. | Modification | |
| Anvil Splitter Recipe Lets you craft a Anvil Splitter | Recipe | |
| Apricot A sun ripe apricot. Can be consumed for a small amount of stamina. | Consumable | |
| ARC Alloy Obtained from ARC enemies or activities, or by recycling certain ARC parts. Used to craft components. | Topside Material | |
| ARC Circuitry Obtained from ARC enemies or activities. Used to craft components. Can be recycled into ARC Alloy. | Topside Material | |
| ARC Circuitry Recipe Lets you craft an ARC Circuitry | Recipe | |
| ARC Coolant Obtained from ARC enemies or activities. Can be recycled into chemicals | Recyclable | |
| ARC Flex Rubber Obtained from ARC enemies or activities. Can be recycled into rubber. | Recyclable | |
| ARC Motion Core Obtained from ARC enemies or activities. Used to craft components. Can be recycled into ARC Alloy. | Topside Material | |
| ARC Performance Steel Obtained from ARC enemies or activities. Can be recycled into scrap metal. | Recyclable | |
| ARC Powercell Valuable resource that drops from all ARC enemies. Used to craft: Shield Recharger | Misc | |
| ARC Synthetic Resin Obtained from ARC enemies or activities. Can be recycled into plastic. | Recyclable | |
| ARC Thermo Lining Obtained from ARC enemies and activities. Can be recycled into fabric. | Recyclable | |
| Arpeggio I A 3-round burst assault rifle with decent damage output and accuracy. | Weapon | |
| Arpeggio II A 3-round burst assault rifle with decent damage output and accuracy. | Weapon | |
| Arpeggio III A 3-round burst assault rifle with decent damage output and accuracy. | Weapon | |
| Arpeggio IV A 3-round burst assault rifle with decent damage output and accuracy. | Weapon | |
| Assorted Seeds A handful of seeds. Celeste might be looking for these. | Nature | |
