Erebus!

The game tells the story of a world destroyed by a conflict between robots and their human masters. Play as Tux in a quest to save the world from the murderous rebel bots who know no mercy. You get to choose which path you wish to follow, and freedom of choice is everywhere in the game.

Summoning Wars is an open source role-playing game, featuring both a single-player and a multiplayer mode for about 2 to 8 players.

Lips of Suna is a tongue-in-cheek action RPG. It's an open world game that focuses on action heavy and versatile gameplay, dynamically changing game world and ease of customization and modding.

Spring is a versatile 3D RTS game engine. Using extensively Lua for scripting game-specific code to make nearly every aspect of the engine customizable, from GUI, to unit AI, to pathfinding.

This is a free software used to create online multiplayer games for people that don't know how to code games. Simple to understand, but still very customizable in every way. To aid people in their projects they offer a full set of programs and resources that, when taken full advantage of, will allow you to create your own fantastic online world.

This heroic-fantasy hack‘n’slash (action/role-playing game) takes you on a continent ravaged by a war that raged ten years earlier. The four Kingdoms of Men, Elves and Dwarves lay in ruins, preyed on by raiders and looters. In this chaos, a new, unknown threat is looming... To discover its true nature, the kingdoms sent detachments to investigate, a dangerous mission from which no one returned. But what about you? You, who were in the wrong place at the wrong time...

The world is living under the dark shadow of a nefarious dragon. Villagers are turning into stone. Armies of skeletons, swarms of wasps, and lumbering ogres lurk everywhere. Evil is spreading like wildfire. And you're the only one who can put an end to it.