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The Protective Universal Crisis Suit, or PUCS for short, bestows its user with immense resistances to environmental hazards such as radiation and fire. The built-in air-filtration system allows the suit to utilize hull oxygen when possible, and the built-in computer injects the user with whatever medicine is placed inside the suit.
~ Item description
Inventory icon

PUCS sprite.png
ID: pucs
Gear, Talent Item
Breathing Supplies Oxygen Tank.png Oxygen Tank
Oxygenite Tank.png Oxygenite Tank
Welding Fuel Tank.png Welding Fuel Tank
Incendium Fuel Tank.png Incendium Fuel Tank
Breathing Supplies Capacity 1 Item Slot
Deconstructor Yield
OutpostOutpost Sell
Habitation OutpostHabitation 167 mk
ColonyColony 167 mk
Research OutpostResearch 201 mk
Military OutpostMilitary 167 mk
Mining OutpostMining 184 mk

The PUCS is an outerwear suit that provides Oxygen, protects against attacks, and protects against High Pressure. The PUCS is an upgrade over the Combat Diving Suit.png Combat Diving Suit, with significantly increased radiation, husk, and burn protection, at the cost of marginally reduced movement speed.


The suit allows the player to breathe while underwater when an oxygen supply is provided. Unlike other Diving Suits, the PUCS will not drain oxygen from the tank while in an oxygenated room, and thus can safely be used without an oxygen supply, as long as the player does not enter water. It also protects the player from the pressure of the ocean, allowing them to exit the submarine and enter rooms that are pressurized due to breaches. The maximum depth of the suit is increased somewhat over regular diving suits, allowing the player to safely reach up to 6,000m in depth.

Players wearing a PUCS move 10% slower and have greatly reduced field of view. PUCS boosts the thrust of Underwater Scooter.png Underwater Scooters by 40%.

The PUCS has a slot that can contain a single medical/chemical item, similar to the Auto-Injector Headset, which is automatically used on the wearer when they reach or drop below 50% vitality. If wearing both auto-injector headset and PUCS, both will use their item simultaneously upon reaching the threshold. Auto-injecting an item bypasses the medical skill check for it and the wearer will always receive the maximum benefit of the item as if the check was passed, regardless of its skill requirement and the wearer's medical skill.

The PUCS has a light which illuminates a small area in front of the player, this light will be on as long as the player is alive.

The PUCS can be stored in a Diving Suit Locker.

Supply effects when worn
Item Effect Supply Duration
Oxygen Tank.png Oxygen Tank +1000 Air 5m 33s
Oxygenite Tank.png Oxygenite Tank +1500 Air

+30% movement

16m 40s
Welding Fuel Tank.png Welding Fuel Tank Affliction Oxygen Low.png Oxygen Low (+20/s)* 3m 20s
Incendium Fuel Tank.png Incendium Fuel Tank Affliction Oxygen Low.png Oxygen Low (+20/s)*

Affliction Burn.png Burn (+0.1/s)*

3m 20s

*The movement speed bonus from an Oxygenite Tank is only granted when the current room has less than 50% oxygen quality, and the character is not swimming.

Protection values

Listed below are the damage reduction values for each blocked damage type.

Damage Type Damage Reduction (In %)
Affliction Bite Wounds.png Bite Wounds -30%
Affliction Blunt Force Trauma.png Blunt Force Trauma -30%
Affliction Lacerations.png Lacerations -30%
Affliction Gunshot Wound.png Gunshot Wound -30%
Affliction Burn.png Burn -90%
Affliction Bleeding.png Bleeding -30%
Affliction Husk Infection.png Husk Infection -95% note
Affliction Radiation Sickness.png Radiation Sickness -100%
Affliction High Pressure.png Barotrauma/Pressure -100% Rated for 6 000m of pressure

Related talents

Talent Tree Description
Talent Ph.D in Nuclear Physics.png
Ph.D in Nuclear Physics
ID: phdinnuclearphysics
Engineer Job Icon.pngEngineer
Tier 4
Unlock recipe: PUCS.png PUCS.
Your attacks with Crowbar.png Crowbars are 140% more powerful.
As long as your Electrical Skill is 100 or higher, you can repair electrical devices 40% past their maximum condition.


The PUCS is likely a reference to the HEV (Hazardous Environment Suit) of the Half Life franchise. Similarly, the talent that unlocks the suit, Ph.D. in Nuclear Physics, references the protagonist of Half Life 1 and 2, Gordon Freeman. Gordon is a nuclear physicist who almost exclusively wears a specialized suit throughout the games and wields his signature crowbar, hence the 140% buff to crowbar attacks.


See also

Misc. Gear