Work together to survive the devastating Dinosaur horde in huge, endless environments.
User reviews: Mostly Positive (23,220 reviews) - 76% of the 23,220 user reviews for this game are positive.
Release Date: May 4, 2012

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AUTUMN SALE! Offer ends December 1


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AUTUMN SALE! Offer ends December 1


Recommended By Curators

"It really doesnt feel like a complete game but its cheap and its fun for a few hours with friends. fun and silly gameplay shooting dinosaurs."

Recent updates View all (105)

November 25

How To Use Dinosaurs To Save 50%

Buy now to be apart of the Loyalty Discount for our brand new game, Guardians of Orion! Launching via Steam Early Access on December 1, 2015. Loyalty Discount members are invited to save 50% for the first two weeks (12/1 - 12/15).

ORION: Prelude is the Best/Worst game on Steam and currently 50% off to celebrate the new Steam Exploratory Sale (11/25 - 12/1).

Share, Like, Comment!

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November 23

Guardians of Orion - Private Access Information

The very first 'Guardians of Orion' Private Access codes have started dispatching. We will continue to release them in waves of a few tthousand at a time. The first thousand is tonight. The rest are continuing out tomorrow morning as we continue to montior the server capacity for the first major time.
- - -
Welcome to the Private Access version of 'Guardians of Orion', our brand new Steam game and the spiritual successor/prequel to 'ORION: Prelude'.

'Guardians of Orion' is a hyper-adrenaline, Twin-Stick Sci-Fi Shooter featuring Dinosaurs and Robots focused on Accessibility, Over-The-Top Gameplay, Power-Ups, 4-Player Local Multiplayer, Destruction, Gibs, Gore and more!

(TRAILER) Guardians of Orion - Steam Early Access

(TRAILER) Guardians of Orion - 10,000 Free Steam Copies

1. This is a pre-alpha game build that will be entering Early Access (available to all of the public) on December 1, 2015.
2. Some audio is placeholder or non-existent.
3. All three Early Access maps are featured ('Arid', 'Outback' and 'Relic').
4. Many gameplay elements are not integrated, including some enemy attacks, gameplay mechanics, generator mechanics, other side objectives and more.
5. This copy of 'Guardians of Orion' will evolve into th Early Access and Official Version.
6. If you have any friends that own 'ORION: Prelude' ($1 on Steam) they can save 50% on Guardians from Dec 1 - Dec 15.
7. Steam-Friend joining is not currently integrated. Scheduled to arrive on Monday's patch (11/23/2015). For now use the browser and create lobbies with friends.

To install your game, please download Steam:

Step 1: Install Steam, Create Account.
Step 2: Click the 'Games' tab at the top.
Step 3: Select 'Activate a Product on Steam'.
Step 4: Type in your Product Code.
Step 5: Install 'Guardians of Orion'.

1. Please check the game settings for inputs.
2. Please direct any questions to:
4, Melee attacks are powerful/great. Default key is V (Click Right Thumbstick).
5, Blinking is your new best friend. Default key is C (B Button).
6. Rolling is the new evade. Default key is Space Bar (A Button).
7. Every Guardian has their own unique ability. Default key is CTRL.(Left Shoulder).

We are looking for as much feedback as possible regarding any and all systems, including current gameplay functions, connectivity, servers, lobbies and more. We are expecting to release an update which will include a new map among many adjustments, addditions and fixes on Monday/Tuesday (10/19 or 10/20) to show what sort of pacing/rate we can integrate your submissions.

Please submit any videos/recordings/feedback to:

[ SAVE 50% ]
Owners of ORION: Prelude will be able to save via a Loyalty Discount (50%) during the first two weeks of sale, from December 1 - December 15, 2015. You can opt into this saving by purchasing ORION: Prelude on Steam for $1:

Additionally, All Steam users are invited to save 10% during the first week of sale, from December 1 - December 7, 2015.

We will be adding new features, tweaks and fixes on the 1st of every month via Content Updates.

Early Access for Guardians of Orion is scheduled to last one year (Dec 2015 - Dec 2016).

The Official Version of 'Guardians of Orion' will debut by the end of 2016 for $29.99 USD via Steam (Windows, Linux, Mac). Free (Windows version) for Early Access owners.

The Special Edition of 'Guardians of Orion' will debut in 2017 for $39.99 USD via Steam (Windows, Linux, Mac) and Playstation 4 + Xbox One. Free (Windows version) for Early Access / Official Version owners.

Feel free to upload and share any clips of gameplay with your fans and please submit any videos/recordings/feedback to:

Thanks for playing!

26 comments Read more


“An instant classic.”
Steam Review

“Best transformation of a game I've ever seen.”
Steam Review

“I am completely addicted.”
Steam Review

Steam Big Picture

Steam Workshop

The ORION: Prelude Developer SDK Beta is launching in September 2014.

If you're a Mapper and would like to participate in private testing please go here:

About This Game

'ORION: Prelude' is an indie Sci-Fi shooter (FPS/TPS) that seamlessly blends together incredible visuals and addictive combat. It puts you and your friends together into intense, cinematic battles using some of the most incredible weaponry and amazing vehicles in which you must work or compete against one another to accomplish mission objectives, explore giant worlds and survive the devastating Dinosaur Horde.

In addition to the return of the adventurous, survival-based cooperative gameplay and retro-inspired Arena Combat, 'ORION: Prelude' features massive, Open World Cooperative and PvPvE.

*Previous version names include ORION: Dino Beatdown (2012) and ORION: Dino Horde (2013).

Supporting up to a variety of game modes, including:
  • Survival (Objective)
  • Slaughter (Duration)
  • Rampage (Playable Dinosaurs)
  • Prehistoric (Custom Variable)

Supporting up to 10 players and offering 2 game modes:
  • Conquest (Cooperative - 5 Players)
  • Vital (PvPvE - 10 Players)

Supporting up to 10 players and offering 3 cooperative game modes:
  • Free-For-All (Deathmatch)
  • Elimination (Stealth)
  • King of the Hill (Territory)
  • Gun Game (Ladder Climb)
  • Instagib (Twitch Reflex)
  • Vital (Open World)

Supporting up to 10 players and offering 3 unique game modes:
  • 1v1 Duel (4 Playlers - Tournament)
  • FFA Duel (4 Players - FFA)
  • Team Duel (5v5)

Key Features:

  • Open World Gameplay
  • Cooperative & Competitive Gameplay
  • Dueling & Melee Combat Gameplay
  • 1st Person / 3rd Person Hybrid Gameplay
  • 15 Game Modes
  • 50+ Weapons & Gear
  • 30 Augmentations (Mutators)
  • 20+ Multiplayer Maps
  • 7 Vehicles
  • Full Weather System
  • Persistence & Player Progression (150 Levels)
  • Class-Based Gameplay & Player Loadouts
  • Statistics & Leaderboards
  • Lobbies, Matchmaking & Server Browser
  • Player Store (Cosmetics)
  • Rewards & Unlockables
  • Real-time Dynamic Day/Night Cycles
  • 10 Dinosaurs (All Playable)
  • 250+ Steam Achievements
  • 12 Steam Trading Cards
  • Steam Big Picture Mode Support
  • Bots & Offline Play
  • Tutorial System
  • SDK & Steam Workshop (Custom Maps)

System Requirements

    • OS:Windows Vista SP2 32-Bit
    • Processor:AMD Athlon X2 2.8GHZ / Intel Core 2 Duo 2.4 GHZ
    • Memory:3 GB RAM
    • Graphics:256 MB Graphics Memory (SM3)
    • DirectX®:9.0c
    • Hard Drive:8 GB HD space
    • Sound:DirectX 9 Compatible
    • OS:Win 7 / Win 8 (64-Bit)
    • Processor:AMD 4-Core / Intel 4-Core
    • Memory:4 GB RAM
    • Graphics:512 MB Graphics Memory (SM 3)
    • DirectX®:9.0c
    • Hard Drive:8 GB HD space
    • Sound:DirectX 9 Compatible
    • Other Requirements:Broadband Internet connection
Helpful customer reviews
229 of 275 people (83%) found this review helpful
220 people found this review funny
9.9 hrs on record
Posted: June 9
The ONLY thing that could make this better would be if there were game modes with nazi dinosaurs.
Was this review helpful? Yes No Funny
194 of 231 people (84%) found this review helpful
245 people found this review funny
8.4 hrs on record
Posted: June 14
Got 360 no-scoped by a T-Rex throwing a rock at me

11/10 IGN
Was this review helpful? Yes No Funny
120 of 146 people (82%) found this review helpful
102 people found this review funny
13.3 hrs on record
Posted: June 20
Always wanted to know what would happen if you rammed a jeep into T-Rex

Was this review helpful? Yes No Funny
64 of 69 people (93%) found this review helpful
11 people found this review funny
11.0 hrs on record
Posted: June 10
TLDR version;

Co-op or versus horde mode shooter with dinosaurs. Some bugs and lacks polish, but for its price (50 Euro Cents thereabout?) this is a shockingly FUN game. If you're looking for a co-op game to play with up to four other friends, I'm giving this game a glowing recommendation!

In a bit more detail:

What's good:
  • Dirt cheap
  • Large maps with obvious inspiration from the Halo games
  • Surprising amount of depth thanks to the three classes, gear choices, augments and vehicles
  • Competent and frantic horde mode gameplay
  • Dinosaurs
  • Silly waves

What's bad:
  • Some obvious bugs here and there
  • Some nice shaders and lighting effects but ultimately not a great looking game, player models in particular are butt ugly
  • Poor volume normalization, you'll know what I mean when you hear the gatling guns fire
  • Solo play with pretty basic bots is supported but feels very lacklustre


I'm quite frankly blown away at how many hours of very entertaining horde mode shooter action my friends and I have had with this game already, value for money wise I don't think I've ever seen any game quite like this. As such I can't recommend this game enough. If you compare 'ORION: Prelude' to 'Killing Floor 2' it doesn't hold a candle of course, but that would be silly, wouldn't it ? I love this game!
Was this review helpful? Yes No Funny
47 of 54 people (87%) found this review helpful
20 people found this review funny
19.2 hrs on record
Posted: June 4
What can I say about ORION: Prelude? Let's start with what it's not...

It's not a perfect game.
It's not 100% bug-free.
It's not a contender for Game Of The Year.

But more importantly, let's go on to what it is...

It's extremely fun.
It's very well supported.
It's extremely fun.
It's got a great community.
It's extremely fun.
It's amazing value for money.
Did I mention that it's extremely fun?

For the price, you wouldn't believe that this is a fully-fledged multiplayer FPS with solid progression, numerous weapons and power-ups, a decent array of vehicles and goddam dinosaurs to gun down! But that's exactly what it is. You probably won't put hundreds of hours into it but it certainly doesn't feel like a £0.79p / $0.99c game. In fact, I reckon this is the single best value for money of any game in my entire collection. I've certainly got my 79p worth and then some - and I still keep coming back for more!

If you like multiplayer FPS and you're not literally penniless, why are you still reading this review? At this price, just buy it already!
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