[Neoforge 1.21.5] Stellaris 1.3.21 is a beta file of the Minecraft mod Stellaris for NeoForge, made for Minecraft 1.21.5. It was published on April 26, 2026 and is 8.4 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Stellaris mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
