Natural Selection Wiki
Natural Selection Wiki
Cosmetic Variants:

Normal Onos

Shadow onos
Shadow Onos

Kodiak onos
Kodiak Onos

Reaper onos
Reaper Onos

Abyss onos
Abyss Onos

Nocturne onos
Nocturne Onos

Toxin onos
Toxin Onos

Kharaa Kharaa
Personal Resources
Icon personal resource neutral 55 (+8 per Evolution)
700 (+50 per Biomass)
450 (500 + 20.00 per Biomass)
Icon resources energy neutral 100
Base Field of View: 90°
Ground Speed: 6.6 (7.1 / 7.6 / 8.1), 10.5 (Charge)
Crouch Speed: 3.3
Abilities and Upgrades
Alien Vision, Evolve Menu, Hive Sight, Gore (Smash), Charge, Bone shield, Stomp
Carapace, Regeneration, Vampirism,
Adrenaline, Celerity, Crush,
Camouflage, Aura, Focus
Charge at biomass 2, Bone Shield at biomass 5, Stomp at biomass 8
Buy From: Evolve Menu
Purchase By: Player, Commander at biomass 9
Gestation Time: 30 seconds
A behemoth that can smash structures and charge into battle and gore players to death. He can also evolve stomp to stun his enemies.

In-game description.


The Onos (plural: Onii[1]) is the largest and most costly Alien lifeform available. It is the ultimate weapon an Alien team can employ and is capable of causing huge destruction to Marines and their Structures.


The Onos is a gargantuan quadruped that appears as a cross between a Rhino and Gorilla, Despite its size, it is capable of reaching impressive speeds with its Charge ability and can deal significant damage to structures using Gore. When the Alien Commander researches Stomp, The Onos is also capable of sending out shockwaves that cause Marines that are unfortunate to be in its path to be knocked down, making them an easy target.


An Onos is a formidable and intimidating presence on the battlefield, however its size and cost also make it a valuable target for skilled or large groups of Marines who will go to great lengths to kill an Onos where possible.

An Onos should never venture into Enemy territory without a Gorge for support and a clear plan of escape. Marines with good map awareness will seek to cut off the escape routes of a fleeing Onos (a 'pinch') in order to deny the Alien team the use of this lifeform.

An Onos should use constant hit and run tactics, causing as much damage as possible or stopping Marine expansion in a certain area then retreating to heal as necessary. Ensure that Charge has been researched to assist in escaping from danger and never stray too far from somewhere you can heal.

A common mistake made by Rookies playing an Onos for the first time is the belief that you are indestructible. An Onos can be easily overcome by direct sustained fire and Marine Commanders have even been known to try and trap an Onos in a room by building a structure at the exits.

When Stomp is researched, it is likely this will become your primary attack. Using Stomp constantly against ground Marines will severely impede their progress and allow lower lifeforms to make easy kills. Stomp also disrupts the targeting of Sentries and detonates Mines.

Tactical Summary - Onos

  • Use hit and run tactics constantly, be confident but never over-commit.
  • Always have a plan to escape and always have a Gorge nearby.
  • Use Stomp to knock down Marines for easy kills.
  • Once you evolved to Onos, you can evolve back to Skulk for free, but this is considered trolling, for some reason.


Main article: Options

Onos Player Controls
Onos view
Movement Abilities Contextual
Mouse 1
Mouse 2
Alien Vision
Evolve Menu
Bone Shield
Last Weapon
Voice Overs Menu


Player Abilities

Alien Player Abilities

Alien Vision

Alien Vision
Aura icon
Toggle Alien Vision mode to highlight all units and structures in white, and the terrain in orange.
  • Brightness is affected by lighting in the room.
  • Red emergency lighting and complete darkness are considered as the same brightness level.
Targets Players, Units, Structures, Terrain
All Kharaa lifeforms possess hypersensitive retinas that allow Alien Vision (or Dark Vision), which changes the lifeform's perspective in order to distinguish between organisms, structures, and the terrain.

Evolve Menu

Evolve Menu
Evolve menu icon
Opens the Evolve Menu to purchase different Kharaa lifeforms and available Traits using Personal Resources.
Targets Lifeforms
Requires Valid ground to spawn player Egg
The Evolve Menu allows Kharaa players to select different lifeforms and unlocked Traits to evolve using Personal Resources. It contains information about each lifeform, such as name, cost, Health, Armor, abilities, effects of each Trait, and more.

Hive Sight

Hive Sight
Hive sight icon
Hive Sight highlights all players and structures in an orange glow. When nearby, Kharaa players can see each other through walls.
  • Parasited targets are visible through walls and glow more brightly.
Range 30
Targets Players, Units, Structures

Hive Sight is an innate passive ability for all Kharaa lifeforms. All nearby visible players, units and structures will be highlighted in an orange glow at all times. Friendly players will also be visible through walls, allowing players to coordinate and position themselves against incoming Frontiersmen forces.


Icon gore
  • Against Robots and Structures: Damage x 200%
  • Disrupts Marine's aim for a short time.
Mouse 1
Energy Icon resources energy neutral 10
Damage 90
Type Structural
Range Melee
Fire Rate 0.5 seconds
Duration 0.7 seconds
Targets Marines, Robots, Structures
Impales a target with the Onos' sharp horn, or smashes a robot or structure with the forelegs that deal extra damage.


Icon charge
Energy Icon resources energy neutral 20 per second
Damage 12
Speed Base Speed + 5.9
Cooldown 0.5 seconds

All Alien units have a movement mechanic that is unique to that class. Charge is the Onos' unique movement mechanic that grants it high forward movement speed. While charging, the Onos cannot change direction, but may attack at any time while halting the charge. When moving, the Onos creates noise and screen shake for nearby Marines, while also creating a stirred dust visual effect around the Onos.

Bone Shield

Bone shield
Icon bone shield
  • Negates all incoming damage from the front.
  • Does not block Hand Grenades, Flamethrower, Railgun or Mines.
  • Onos can move slowly while active (speed of 4.5).
  • While active, energy regeneration is reduced by 50% (all sources).
  • Recharge occurs immediately while out of combat, or 3s after deactivation.
  • If Bone Shield is broken, recharge occurs after 6s.
  • Recharge rate is 130 shield hitpoints per second.
Mouse 1
TRes Icon team resource neutral 25 to research
Research Time 40 seconds
Damage reduction 100%
Duration Until cancelled/endurance depletion max. 8 seconds
Cooldown 0.425 seconds
Targets Bullets, Explosives, Flames, Railgun
Requires Biomass level 6, Research Bone shield
Extends the bone blades on the Onos' forehead to shield against damage from the front.


Icon stomp
  • Disables Marines' attack and movement.
  • Disrupts Sentry targeting and fire rate.
  • Detonates Mines prematurely.
Mouse 2
TRes Icon team resource neutral 35 to research
Research Time 90 seconds
Energy Icon resources energy neutral 30
Damage 40
Type Heavy
Range 12
Radius 2
Duration 2 seconds
Targets Marines, Sentry, Mines
Requires Biomass level 8, Research Stomp
Stomps the ground to create cracks and a shockwave along the floor, which cause nearby Marines to lose their footing temporarily.


The following images show all the variations of Onos camouflage (skins) that you may see in the game.

Info Info:  • Not all variants are available for purchase.

          • Skins are purely cosmetic and offer no augmented or additional stats in-game.

Camouflage variants & availability
Variant Description Acquisition Notes
Normal Default camouflage. Provided with game. N/A
Shadow Red eyes, dark blue/purple skin, extrusions on exo-skeletal features. Can be bought in the Customization Screen in-game. Originally part of the Reinforcement Program for Shadow Tier & above, and completed with the Merry Gorgemas! update (Build 336).
Kodiak Green eyes, jungle effect skin. Can be bought in the Customization Screen in-game. Released with the Kodiak update, and completed with the Merry Gorgemas! update (Build 336).
Reaper Red eyes, white skin, black exo-skeletal features. Can be bought in the Customization Screen in-game. Released with the Reaper update, and completed with the Merry Gorgemas! update (Build 336).
Abyss Blue eyes, blue skin. Can be bought in the Customization Screen in-game. Was added with the Merry Gorgemas! update (Build 336).
Nocturne Purple eyes and tails. Can be bought in the Customization Screen in-game. Release with the Nocturne DLC as part of the NS2 5 year anniversary update (Build 319).
Toxin Green glowing eyes, green patches of skin and green belly. Can be bought in the Customization Screen in-game. Released with the Catalyst update (Build 324).