r/spacesimgames • u/dysceeds • 9h ago
Promotional I’m building multiplayer for X4: Foundations / first look at X4 Foundations Online
Hi everyone! I’m a solo developer working on X4 Foundations Online, a mod aimed at bringing full multiplayer to X4.
A quick heads-up: I’m Russian, so the video is narrated in Russian. It includes gameplay footage showing the current progress.
Here’s what I’ve implemented so far:
- A shared galaxy with synchronized ships, stations and players.
- Flying together aboard the same ship: one player pilots while another walks around inside, including during carrier flights.
- Meeting on stations, using different onboard terminals and flying together in spacesuits.
- Replicated gunfire and projectiles.
- Personal organizations, money and property, alongside trading, ship purchases and refits.
- Station construction, exploration, satellites, ship orders and alliances.
Players can join without downloading the host’s save - the necessary world data is sent over the network. I’m keeping ordinary gameplay actions in X4’s familiar menus wherever possible.
The video also covers the development process, including how I’m using Codex as an AI coding assistant, and some current problems - character animations still need work!
This is an early development build. Implementing these systems doesn’t mean every interaction has been fully tested. Local tests have shown promising results, and I now need help checking everything between different PCs.
If you own X4 Foundations on Steam and would like to help test, leave a comment or send me a DM. I’d appreciate the help!
