Alternatives to Marathon Infinity

First-person shooter, first in a trilogy

First-person shooter, second in a trilogy

Open-source continuation of Bungie's Marathon 2 game engine

2D and 3D game engine

GameStream client

Real-time strategy game engine for Westwood games

Playstation 2 Emulator

Game launcher

First person shooter engine

Game launcher with the ability to run Windows games

Online multiplayer game platform

C# scripting capable version of Godot game engine