Zero Caliber is a military FPS developed exclusively for VR. Customize your weapons on-the-fly, fight alongside your friends in Co-op (PvP coming soon!) and use your tactical skills to accomplish the mission: saving humanity! Engaging story, realistic weapon handling and physics in an immersive environment!
All Reviews:
Mostly Positive (305) - 73% of the 305 user reviews for this game are positive.
Release Date:
Nov 9, 2018

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We do believe that if we want to develop the best game possible, we have to work with our players. Our goal is to develop a realistic military FPS for Virtual Reality headsets that every player loves and enjoys. Without player feedback, we couldn’t accomplish that. Moreover, when the full version of the game will be accessible, we would like it to be free of any defect or bug.
That is why we need players’ feedback, even during development. We take every feedback, opinion, critical thought seriously, so please don’t hesitate to contact us. We’re listening, and as an addition, you will become part of the development process!”

Approximately how long will this game be in Early Access?

“We’ll release the full version when every aspect of the game is polished, and we’re fully satisfied with its state. :) Currently the estimated release date is early 2019.”

How is the full version planned to differ from the Early Access version?

The full version will also contain:
- The 2nd half of our story
- A lot more weapons and attachments
- Shorter, challenging Co-Op missions

What is the current state of the Early Access version?

The game's core mechanics are layed down: physics based interaction, customizable weapons with various attachments.
The EA version will contain the tutorial, first half of the story and a Co-op missions.

Will the game be priced differently during and after Early Access?

Price may increase moderately when we release.

How are you planning on involving the Community in your development process?

"We regularly monitor our community channels, including our forum on Steam, our Discord and our social media (Facebook and Twitter). We extensively test the game/its updates before it goes live, but if players find a bug, they can report it and we’ll fix it as soon as physically possible.
We also take the best/most upvoted ideas and add them into the game.

Our quest is to develop the best, most immersive military tactical shooter available for VR!"
Read more
Notice: Requires a virtual reality headset. See the VR Support section for more info.

Buy Zero Caliber VR


Recent updates View all (15)

December 14

Zero Caliber Update - New map, M14, Comfort mode & a lot more!

Hey guys!

'Tis the season to be jolly! The Holidays are coming, and we prepared a little surprise for you.
In this update, you'll find a new, snowy mission: Frostbite with a present: a tactical shield hidden somewhere on the map. It's for testing purposes, please send us feedback!

We implemented a much awaited weapon: the M14. You suggested, we made it happen!
Comfort mode is also here, hopefully it will help those who suffer from motion-sickness!

We fixed and improved countless things thanks to your overwhelmingly positive feedback and suggestions. Thank you guys for all the feedback, keep them coming!
Detailed patchnotes below:

Player / control improvements

  • Added “Comfort mode”, which you can enable via the options menu. This adds a black fade on the edges of your view if you are moving too fast. This way we hope you can avoid VR sickness.
  • Added “VR Center Arrow”, which you can enable via the options menu. This will indicate the center of your roomscale VR setup.
  • In Co-op mode now you can view your stats with the long press of the ‘option’ button.
  • Improved weapon pick up for oculus
  • Grenades can be cooked with top action button (no need to pull out pin manually)


  • New M14 Rifle
  • Winter Camo
  • Red Dot with Darkened Sight designed specifically for bright levels
  • New Tactical Shield (hidden on Frostbite level)
  • Slap slider release for MP5s (H&K Slap Reload)
  • Glock scope attach fix
  • Side attachments for AWP
  • Weapon recoil drop to slot fix
  • Projectile particle optimization
  • Authentic PSO crosshair


  • Improved Projectile Visuals, more variated look between the different calibers
  • Improved Performance on ‘Comfort’
  • ‘Comfort’ and ‘Timber’ Environment fixes
  • Pixel density setting slider fixed: previously it was set to default regardless of the selected value - crispier graphics when set to high, better performance when set to low


  • New level: Frostbite
  • Tank, Stryker improved collisions


  • Optional respawn at checkpoint in Co-op
  • Rare crash on 'Comfort' fixed
  • Occasional crash on 'Timber' fixed
  • Removed collision with small items on the floor, so the VR experience is smoother
  • More weapon types for your friendly soldiers
  • Easier to survive with the Second Wind feature, you have half a sec to move to cover when you are about to die
  • Sacr stock unlock fixed
  • Shooting and Clipping through Walls on ‘Timber’ and ‘Comfort’ fixed


  • Music can now be turned off
  • Sound slider bug fixed

Once again thank you guys for all the feedback and suggestions, we couldn't be more thankful! Keep them coming!
11 comments Read more

November 29

Zero Caliber Update - SVD Dragunov, auto grip/ungrip & more!

Hey guys!

In this update you'll find a new sniper rifle: the SVD Dragunov with the PSO scope.
Auto grip/ungrip got implemented, the previously implemented snap/smooth turn can now be disabled in the control settings and FPS drops while using scope is gone.
Check the detailed patchnotes below!

New weapon and attachments:
  • SVD Dragunov Sniper Rifle - with the PSO Scope!
  • RIS Adapter / PSO scope for AK47, AKM, AS Val

Player/Controls improvements:
  • Auto grip, auto ungrip by proximity is now available both on Oculus Rift and HTC Vive! Can be turned on/off in the settings menu.
  • Option to turn off snap/smooth turn is now available in the settings menu!
    How to snap/smooth turn?
    Oculus: On dominant hand (right by default) move joystick left/right
    and release
    Vive: On dominant hand (right by default) PRESS left or right quarter of the touchpad
    Attention! Input controls changed for HTC Vive and Windows Mixed Reality headsets in the last update:
    - Fire mode change (auto, semi, safety): primary hand controller menu button short press
    - Attachment release: primary hand controller menu button press-and-hold

Gameplay improvements/changes/fixes:

  • Improved gun recoil on every gun (very rarely flies out of your hand, but if you wield an assault rifle one handed, it will be extremely inaccurate)
  • Improved gun handling, controller positions
  • Increased player health on higher difficulties, changed regeneration pattern
  • Enemy aim adjustments
  • New armory layout
  • Changed default weapon unlocks
  • ‘Forest’ map repeatable helicopter sequence bug fixed
  • Countless gameplay fixes throughout all levels

Multiplayer improvements and fixes:

  • Fixed crash at Hail level completion
  • Player weapon slot is now handled on client side
  • Stryker firing synced to client side
  • Wall explosion synced to client side

Graphical optimization and fixes:

  • Scope optimization: default scope has better performance, also you can set lower resolution, or lower quality scopes too in the Quality Settings - no more fps drops when using scopes!
  • Player hit effect optimized (previously it caused huge performance drops on weaker PCs)
  • Suburbs’ map significant performance and lighting improvements
  • Minor weapon effect visual improvements
  • More visible projectiles: enemies are shooting slightly more visible projectiles for more readable combat
  • Fixed player’s right wrist’s delayed motion to the controller’s real location


  • Multiplayer server list: people from different regions might not find each other’s servers
  • Occasionally there is no sound on Oculus
  • AI is constantly being improved
  • Graphics optimization
  • Crash on startup with Unreal Engine error: this might be caused by software conflict.
    If you have ASUS sound driver installed: exit from the asus sound driver or end the process with SS2UILauncher.exe. Try to disable the asus sonic sound at startup.
    Nahimic, MSI sound or similar audio apps might also cause a crash.

As always, thank you for your continuous support! Share your ideas, suggestions and feedback with us either here on our community hub or on our Discord server!
12 comments Read more
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About This Game


Zero Caliber VR is a first-person tactical shooter developed by XREAL Games exclusively for premium Virtual Reality headsets.
The story brings the player to a dystopian United States in the not too distant future where physics-based interaction combined with hyper realistic weapon handling and stunning graphics will make you feel like you’re physically part of the action. Fight either alone, or with your friends throughout the whole campaign, which is fully playable in Co-Op.
Action-oriented story, gripping gunfights, realistic weapons with an on-the-fly swappable attachment system. Immersion like you’ve never felt before in a VR military shooter!


Handle, aim and reload your weapons with real-life movements! We modeled the in-game weapons based on their real-life counterparts paying extreme attention to detail. Each weapon has its unique reloading method that you have to learn and practice to fully master them.
If you fancy explosions, just grab a grenade and throw it at the enemy. After you pulled the pin of course.
Stay in the open for too long and you’re dead. Try to find cover instead, duck, crouch, sneak, peek around a corner, clear obstacles with real-life movements. Military combat isn’t all about shooting. Being aware of your surroundings, the terrain, and working together with your squadmates are all part of a successful mission. Don’t let your fellow soldiers down!


Everyone has a unique playstyle. Is accuracy your thing? Put a laser sight on your assault rifle and take accurate shots in semi-automatic mode, or just grab a sniper rifle. Are you more of a shoot first, ask later type of person? Take a shotgun, or dual wield your machine guns in fully automatic firing mode. Be careful though, recoil can make your job really difficult! Combine your favourite gun with your favourite attachments on-the-fly to find out which variation suits you the most!


Water is life. Someone should’ve made that clear before humanity started poisoning Earth with microplastics. Now water is death. People are fighting for drinkable water, for survival.
The military tried their best to keep order, but inevitably they got overwhelmed. That’s when mercenaries appeared.. then entire private armies.. and then when hope started to fade away came the religious cults. The most fearsome of all is a secretive organization worshipping Tlaloc, the aztec God of rain. The “Tlalokii”, as they call themselves. Their motto? “Join us or perish”. What is even worse, they know something that can change the fate of humanity.
Be part of this action-packed, story-driven VR adventure where you fight alongside your fellow soldiers trying to keep order… or what’s left of it anyway.


We place realism above anything else. Graphics and ambiance are crucial parts of this, that’s why we took extreme care in audio and visual design. Explorable open environment, stunning graphics, background noises, realistic weapon sound effects.

A constantly developing military VR FPS experience that will surely make you forget that you are in a video game!

Mature Content Description

The developers describe the content like this:

First person shooter violence.

System Requirements

    • Requires a 64-bit processor and operating system
    • OS: Windows 7 - 64 bit
    • Processor: Intel i5-4590
    • Memory: 4 GB RAM
    • Graphics: NVIDIA GeForce GTX 970
    • Storage: 20 GB available space
    • Additional Notes: Requirements are for Early Access
    • Requires a 64-bit processor and operating system
    • OS: Windows 10
    • Processor: Intel i7-4770
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GeForce GTX 1070
    • Storage: 20 GB available space
    • Additional Notes: Requirements are for Early Access

What Curators Say

13 Curators have reviewed this product. Click here to see them.
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