FEDIDEVS

0 A.D. is a free and open-source, historical Real Time Strategy game, focused on the period from 500 B.C. to 1 B.C., under development by Wildfire Games. It's cross-platform, playable on Windows, macOS, FreeBSD, Linux, and OpenBSD. Choose from 13 different civilizations, a multitude of maps, game modes, single player or multiplayer.

Official Veloren account
Veloren is a multiplayer voxel RPG written in #Rust. It is inspired by games such as Cube World, Legend of Zelda: Breath of the Wild, Dwarf Fortress and Minecraft.
Veloren is fully open-source, licensed under GPL 3. It uses original graphics, music and assets created by its community. Being contributor-driven, its development community and user community is one and the same: developers, players, artists and musicians come together to develop the game.

Official Battle for Wesnoth Mastodon feed. Check our site's status at https://status.wesnoth.org.

Speed Dreams is an Open Source Motorsport Simulator featuring high-quality 3D graphics and an accurate physics engine, all targeting maximum realism.

Official account for the SuperTux Project.

If you've made or are currently making any addons or fan content, toot about it with #supertux and it will be boosted!

Simutrans is an open-source transportation simulator available for Linux, macOS, Windows and Android. Your goal is to establish a successful transport company by building a transport network you always dreamed of.

Brought to you by the Simutrans Team, an international team of volunteers.

OpenTTD is a free and open source transport simulation game.

This account is unofficial but developer-run.

Open source game inspired by Minecraft