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ION Heart Multiplayer - A Lo-Fi Mech TTRPG

Created by Parable Games

Explore the galaxy of the Astral Union with your friends as you help make space a peaceful place. Pilot your mech companions around the stars together in this lo-fi Multiplayer TTRPG. A follow up to the ION Heart Solo RPG.

Latest Updates from Our Project:

Gameplay - How Do You Play Ion Heart Multiplayer?
5 months ago – Tue, Mar 03, 2026 at 04:25:37 AM

Our first Update you voted for is here, and we’re going to take a look at the gameplay today! The best part of this Update being first is that you can actually experience the gameplay for yourself RIGHT NOW! If you want to skip this update and get straight to the playable experience, we've got you!

Followers Can Get the QuickStart Now From the Main Page or At The Bottom of This Update!

The QuickStart is the ideal way to jump straight in and play in the Astral Union.

It comes with premade Character Sheets, the basic rules of the game, some lore that sets up the world, and an adventure that pulls together everything you’ll learn into a playable experience for three to four people.


Gameplay in the ION Heart Multiplayer RPG vs the ION Heart Solo RPG

ION Heart Multiplayer is building on the world of the ION Heart Solo RPG (already out and ready to play), to bring an entirely new way to experience the interstellar world of the ION Heart universe. There’s a few things their gameplay has in common:

  • An Easy to Learn Ruleset - Both games use six-sided dice (D6s) to play. They’re recognisable, and all maths is kept to a minimum. The better your character is at a skill, the more dice they get to roll, and each 4+ rolled counts as a success. We want your first experience with ION Heart to be as easy to get into as possible.


  • Guides to Making Your Own Stories - ION Heart Solo uses Story Circuits to show you how to tell your own stories, and ION Heart Multiplayer has a new Encounter system following in the same basic story-focused structure. Both games use the same easy-to-understand ranking method for the type of adventure you’ll get from Circuits or Encounters: Peaceful, Protective, and Dangerous.


  • Rich and Free Character Design - The world of ION Heart has so many species and cultures, that the designs of Mechs are only limited to your imaginations. Each game provides examples, but the final choice is down to you!


What’s New in ION Heart Multiplayer?


  1. The Heart - Our gamemaster, the one keeping the story moving and placing challenges before the players. The Heart is very much a player, too, and we’ve worked hard to create a simple and clear rule system that adds to game night, and doesn’t take away from it.
  2. Sync Bonds - We’ve expanded on the Sync system. A representation of how close your Pilot and Mech are becoming, this mechanic lets you show that friendship off in all kinds of epic ways. Heroic Actions, synchronised actions, or even just allowing the re-rolling failed challenges! We’ve also added Team Bonds, which represent different players' ability to work together, and the strength of the bond that their collective journey has forged between them.
  3. Maps - We’ve worked on a simple map system to enhance not only combat, but also interactions with the world around your characters. Whether it's a local culture festival to explore, a rescue operation to undertake, or an epic-scale Mech battle, you get to see that unfold before you and your team.


An Example of ION Heart Multiplayer Gameplay (transcribed)

Charlie (The Heart): The building begins to crumble down, making rescue look very difficult.

Matt (Daro Blackwing): My Mech is going to try and stabilize the building, and my Pilot is going to help by shouting out structural weak points. Does that count as a synced roll?

Charlie: It does! Roll your Pilot Mind to see how helpful you are first.

Matt spends the 1 Sync Bond point he has, and checks his character sheet and sees that Daro has 3 Mind. He rolls three D6, and gets a 1, a 5, and a 4. He has one spare Sync Bond point, so he chooses to reroll the 1, getting another 4.

Charlie: That’s three successes! So make Mech your Mech Brawn roll, and add an extra three dice!

Matt checks his sheet again and sees that his Mech, Skreech0r, only has 1 Brawn. He rolls four dice, and luckily gets a 4, 5, 5 and a 6!

Charlie: The building is held together, giving more than enough time for the people inside to evacuate safely. They all look up to Skreech0r with a look of awe on their faces.


A Pilot and a Mech

Aside from the Heart, who is running the game, each other Player will take on the roles of both a Pilot and their companion Mech. When interacting with other players at the table in character, players will usually take on the character of their Pilot. Pilots come from all over the Astral Union, can have different cultures and personal backstories, but they all share a way of communicating, whether that be through common language or advanced translation devices.

Mechs are more complicated, as they are not fully autonomous living beings, but are instead considered "mostly sentient". This means that while they can develop "personalities" and build relationships with others, even developing their own jokes and stories over their lifespan, they cannot act with full autonomy for long periods of time, and are limited in their ability to coordinate with parties other than their Pilot.

The character of the player's Mech only comes out passively through interactions with their own Pilot, or directly to other players on occasions when the Mech is separated from its Pilot. When a Pilot is interacting with their Mech, no one wants to sit through a one-person roleplay show, so the player would quickly summarise what the interaction is like based on their Pilot and Mech's personalities and bond.


ION Heart Multiplayer's Solo Mode

ION Heart Multiplayer will include a solo mode, so all the ION Heart Solo RPG players can come and experience this age of the Astral Union as well, exploring the universe in a setting different to the one they're used to.

Unlike the ION Heart Solo RPG, which uses its own "Story Circuit" mechanical system for running adventures, the ION Heart Multiplayer game will have its own "Oracle" style system that reflects the changes between the two games, which we will cover in more detail in a future update!

We’d love to hear your feedback on your Quickstart experience, so make sure you download it and head over to our Discord Server {Click for Link to join!}. Speaking of which, we are nearing our community goals (more on this here!).

Next week, we will look at ENCOUNTERS in closer detail - but until then, what will be your role in ION Heart? Let us know in the poll!


The World of Ion Heart - ⭐⭐⭐ Strive for Peace Amongst the Stars ⭐⭐⭐
5 months ago – Tue, Feb 24, 2026 at 07:42:10 AM

Welcome, Pilots, to the world of Ion Heart. 

This may not be your first journey to the Aegeic Galaxy (shoutout to our Ion Heart Solo RPG players!), but we wanted to take the opportunity to introduce the world of ION Heart to potentially new players, as well as highlight the differences returning players might find in the world of the ION Heart Multiplayer RPG.

The story of ION Heart Multiplayer begins many years before the world of the Ion Heart Solo RPG...

60 years ago, in the Aegeic Galaxy 🌌 ...

The Emergence War finally came to a close - It was a conflict that spanned across the entire Aegeic Galaxy, uniting all societies against one terrifying threat: the Nephilim. These bio-mechanical monsters threatened to destroy, consume and absorb all life, but the cultures of the Aegeic Galaxy set aside their differences, worked together, sending their pilots in newly Mechs into the battle. The Astral Union, an alliance formed of many of the nations within the Aegeic Galaxy, stood against the Nephilim. After many long years of conflict, the war was finally won.

Much was lost, the damage dealt during the war to all sides left wounds that will take time to heal, but the galaxy was saved. In the wake of the war, the Astral Union has been slowly rebuilding itself through collaboration and governance, its separate nations still united under one banner. Without a war to fight and a common enemy to unify against, there are some who rally against the ideals of the Union, but many still welcome it with open arms.

The world of the Ion Heart Solo RPG takes place in the future, in a more stable and peaceful time for the Aegeic Galaxy.

The ION Heart Multiplayer RPG let's you undertake the journey to make that peaceful version of the galaxy.

The Pilots and their Mechs who fought during the war all face the same dilemma - the war is over, the fighting is done, so what is their purpose now? That is up to you to find out!

We're building on the world of the ION Heart Solo RPG to give new and returning players a different experience, while keeping the same heart of the world in tact. ION Heart is still a game filled with hope - and now you get to share that hope directly with your friends.

What should we explore next?

There's still so much more about ION Heart Multiplayer to discover! We are going to be doing some more preview updates before the campaign launches, but we want to hear what you want to see next. 

Vote on the attached poll to choose from these topics for the next update:

  • Rules Overview: A discussion on the new ruleset, its evolution from the ION Heart Solo RPG, and sneak peeks of new exciting mechanics.
  • A Stat Block For A New Enemy: See what foes threaten the fledgling Astral Union, as we dive into a new enemy design and talk about what makes them tick. 
  • Encounters Preview: Explore the new encounter system inspired by the Solo games Story Circuits! Peaceful, Protective, and Dangerous Encounters all exist in the Aegean Galaxy - we'll discuss their differences and how fighting your enemies and dangers you discover isn't always the answer. 

That's all for now, Pilots. Thanks for all your support so far - we are looking forward to exploring the galaxy with you and beyond!

Welcome to the Astral Union + Community Goals Unleashed
6 months ago – Wed, Feb 18, 2026 at 02:24:56 AM

Welcome Citizens!

Over 2000 of you (!!!!) have joined us so far as we seek to bring the next installment of ION Heart to the galaxy.
This is incredible and we are delighted to have every last one of you on this journey with us.


Social Goals
To celebrate we are unleashing THREE Community Goals! Unlocking these goals will see new content added to the The ARK, a free collection of ION Heart content we will be releasing to all backers - the bigger the campaign, the more that gets added!

The ARK Project is a cultural preservation effort that would recruit many Pilots and their Mech companions into its ranks as Arkivists. Their quest is to travel the galaxy, visit planets, log their communities, cultures and stories, identify any threat to them, and stop it if possible.

The ARK will expand as more goals are reached, focusing on the findings of these Arkivists, the first 3 goals we are looking to unlock are:



You can vote below for what you want to Arkivist Tarrin to have discovered on his journey. When we get 100 new Discord members (join our Discord Server here) this will be added into The ARK!



What’s Comes Next?
We are working on finalizing the page and working on Ion Heart heart, and over the next few weeks we will be sharing:
•⁠  ⁠New Lore from the Astral Union
•⁠  ⁠Sample Stat Blocks
•⁠  ⁠⁠Encounter Examples
•⁠  Rules overviews
•⁠  ⁠⁠Some exciting new additions...

We will share this through these updates, but make sure you join our Discord Server for behind-the-scenes access and to chat with us and our amazing community!

Thank you again to everyone who has joined us so far - we have an incredible few weeks coming up.

Team Parable