| Steel Spring-delete | component | |
| steel-spring-recipe | component | |
| Sterilized Bandage A medical item that gradually restores a large amount health over time. | Quick Use | |
| Sterilized Bandage Recipe Lets you craft a Sterilized Bandage | Recipe | |
| Stitcher I Full automatic SMG. Deals good damage, but has quite a low fire-rate and can be hard to control. | Weapon | |
| Stitcher II Full automatic SMG. Deals good damage, but has quite a low fire-rate and can be hard to control. | weapon | |
| Stitcher III Full automatic SMG. Deals good damage, but has quite a low fire-rate and can be hard to control. | weapon | |
| Stitcher IV Full automatic SMG. Deals good damage, but has quite a low fire-rate and can be hard to control. | weapon | |
| Surge Shield Recharger A handkeld kit that recharges a shield | Quick Use | |
| Synthesized Fuel A canister of synthetic fuel blend. | Material | |
| Syringe A sterile syringe for medical use. Used to craft medical supplies. Can be recycled into plastic. | Topside Material | |
| syringe-recipe | component | |
| Tactical MK. 1 Basic tactical augment. More Quick Use slots for more tactical choice, but limited survivability and slightly lower looting potential. | Augment | |
| Tagging Grenade A grenade that detonates after a delay, tagging Raiders and ARC enemies in an area, allowing you to briefly track their location. | Throwable | |
| Tagging Grenade Recipe Lets you craft a Tagging Grenade | Recipe | |
| Tattered ARC Lining Obtained from ARC enemies or activities. Can be recycled into fabric. | Recyclable | |
| Tattered Clothes Can be recycled into fabric. | Recyclable | |
| Tempest I Fully automatic assault rifle with moderate fire rate and accuracy. | Weapon | |
| Tempest II Fully automatic assault rifle with moderate fire rate and accuracy. | Weapon | |
| Tempest III Fully automatic assault rifle with moderate fire rate and accuracy. | Weapon | |
| Tempest I Recipe Lets you craft a Tempest I | Recipe | |
| Tempest IV Fully automatic assault rifle with moderate fire rate and accuracy. | Weapon | |
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| Thermostat Can be recycled into crafting materials. | Recyclable | |
| Tick Pod The explosive pod from a Tick. Can be recycled into ARC Alloy. | Recyclable | |
| Toaster Can be recycled into crafting materials. | Recyclable | |
| Torch Ginger A plant used to craft medical supplies. | Material | |
| Torn Blanket A tattered piece of cloth. | Recyclable | |
| Torrente I Semi-automatic pistol. Fires two shots at a time | Weapon | |
| Torrente II Semi-automatic pistol. Fires two shots at a time | Weapon | |
| Torrente III Semi-automatic pistol. Fires two shots at a time | Weapon | |
| Torrente IV Semi-automatic pistol. Fires two shots at a time | Weapon | |
| Torrent I Recipe Lets you craft a Torrente I | Recipe | |
| Trigger Nade A remote-detonated grenade that can stick to surfaces and ARC, dealing explosive damage when triggered. | Throwable | |
| Trigger Nade Recipe Lets you craft a Trigger Nade | Recipe | |
| Vase A decorative vase, possibly valuable. | Trinket | |
| Venator I Semi-automatic pistol. Fires two shots at a time. | Weapon | |
| Venator II Semi-automatic pistol. Fires two shots at a time. | Weapon | |
| Venator III Semi-automatic pistol. Fires two shots at a time | Weapon | |
| Venator IV Semi-automatic pistol. Fires two shots at a time | Weapon | |
