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Oort Protocol: Perihelion
Command 4 operators in a hardcore tactical roguelike set in 2476. No tutorials. No hand-holding. Decipher a system-wide conspiracy through ASCII tactical combat and deep terminal interrogation. Every choice persists.

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Features
Single-player
Family Sharing
Profile Features Limited 
Languages:
Interface Full Audio Subtitles
English ✔

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are 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?

“EA Version of the Protocol with limited mission scope to fine tune the terminal interface before full version. Demo available with the first mission and core mechanics.”

Approximately how long will this game be in Early Access?

“Estimated full release: Q4 2026”

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

“HOW WILL THE FULL VERSION DIFFER FROM EARLY ACCESS?
Early Access Version (Perihelion - Current State):

- Core tactical combat system functional
- Basic squad management and customization
-2 playable factions with preliminary campaigns
- Character origin selection system
- Interrogation/dialogue system (2 full, story-driving dialogues with consequences)
- CRT terminal interface and visual style
- ASCII tactical battlefield
- Foundational lore and mission briefings
- Limited mission variety
- Basic permadeath and consequence systems

Full Release Version (Perihelion - Complete):
Content Expansion:

- All major factions playable with complete campaign paths
- 10+ distinct mission types with environmental variation
- Full Story arc with 10+ pre-designed mission
- Expanded interrogation scenarios and intelligence gathering
- Complete lore integration across all missions and dialogue
- Multiple ending paths based on faction and command decisions
- Expanded squad customization and equipment loadouts
- Additional soldier classes and specializations


Post-Full Release:
Once Perihelion reaches 1.0, development shifts to Helion (Part 2), which will:

- Continue the trilogy story
- Import save data and choices from Perihelion
- Enter its own Early Access cycle
- Expand to new locations in the solar system
- Introduce new factions and escalated conflict”

What is the current state of the Early Access version?

“
Core interface:
- Main menu with CRT terminal aesthetic
- Functional green phosphor shader effects
- Military terminal visual style established
- Screen navigation system

Character Creation Flow
- Faction selection interface (choose your allegiance)
- Full Squad creation and loadout pipeline functional
- Mission briefings

Dialogue/Interrogation System
- Complex dialogue engine operational
- 2 interrogations fully implemented as proof-of-concept
- Branching conversation trees
- Lore integration through dialogue
- No hand-holding—read carefully or miss intel
”

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

“The price for early access will be lower than the full game.

Disciplined Commanders also have the possibility to pre-purchase the whole upcoming trilogy at a discount right now.”

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

“
The Oort Protocol is developed by a solo dev who actually reads feedback.
All support in finetuning the game mechanics and balance welcome. ”
Read more

Download Oort Protocol: Perihelion Demo

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About This Game

Commander

The system is waiting for you to take control over OORT PROTOCOL: PERIHELION missions, leading a squad of four through the tensions leading the Solar System towards war, as the tension between The Planetary Alliance and Imperial Earth grows.  

Every action counts, every decision has downstream effects. Gather intel to succeed. And survive.

After the first mission, further missions coming in June (EA), full protocol available in Q4

Good luck, Commander

HQ Out

System Requirements

    Minimum:
    • OS *: Windows 7/8/10/11 (64-bit)
    • Processor: Intel Core 2 Duo E8400 / AMD Phenom II X2 550
    • Memory: 2 MB RAM
    • Graphics: Intel HD Graphics 4000 / AMD Radeon HD 5450
    • Storage: 500 MB available space
* Starting January 1st, 2024, the Steam Client will only support Windows 10 and later versions.
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