A direct successor to the C4 engine.
Ranked in these QuestionsQuestion Ranking
Pro Complete access to high quality C++ source code
Tombstone gives full access to the clean and professional C++ source code allowing editing and upgrading anything in the system.
Pro Reliable, fast and well optimized
Pro No royalties
Pro Lots of learning resources
Including extensive documentation both in code as well as online along with a wiki, tutorials and a demo game.
Pro Extending engine's functionality is straightforward
Due to the well-organized, highly modular design of the engine adding custom functionality is easy.
Pro Full-featured and modern
Comes integrated with support for physics, audio, networking, input devices, resource management as well as modern features such as real-time shadows, horizontal mapping, voxel-based terrain, dynamic lighting, post-processing effects and much, much more.
Pro Lifetime engine updates
Pro Supportive community
Tombstone has a small, tight-knit community that's well educated and professional. Eric Lengyel, the main developer, can often be found giving thorough advice to users on the forums.