Freedoom

About

Freedoom is a free open-source project that provides content for the classic Doom engine. It includes two single-player campaigns named Phase 1 and Phase 2 along with FreeDM a set of deathmatch levels. The gameplay mirrors traditional Doom with fast-paced action and retro 3D environments. Players can use these files with any compatible Doom engine to create or modify levels. The project focuses on accessibility and flexibility allowing anyone to tweak or build upon its content. Released in 2003 it runs on multiple platforms including Windows Linux Mac and mobile devices. Its BSD license encourages customization making it a popular choice for modders and retro enthusiasts. The focus remains on keeping the spirit of Doom alive without commercial constraints.