DOS Defender
A real-mode DOS game for Ludum Dare #31, playable in DOSBox with joystick support.
What is DOS Defender?
DOS Defender is a real-mode DOS game developed for the Ludum Dare #31 game jam in 2014. It's a compact 10kB executable that runs in DOSBox emulation environments, requiring minimal system resources and no external assets. The game demonstrates efficient low-level programming techniques for retro gaming platforms.
Retro gaming enthusiasts, low-level programmers interested in DOS development, and game jam participants studying efficient game programming techniques.
It showcases extreme code optimization for DOS platforms, treating the environment as an embedded system while delivering a complete gaming experience with joystick support and no dependencies.
Overview
DOS Defender (Ludum Dare #31)
Use Cases
Best For
- Studying real-mode DOS game development techniques
- Learning GCC optimization for embedded-like systems
- Creating ultra-compact executables for retro platforms
- Game jam projects with strict size constraints
- Experimenting with DOSBox as a target platform
- Understanding x86 real-mode programming concepts
Not Ideal For
- Developing modern games with 3D graphics or online multiplayer features
- Projects requiring native execution on contemporary operating systems without emulation
- Teams using non-GCC compilers or integrated development environments for DOS programming
- Game developers seeking extensive asset libraries or middleware integration
Pros & Cons
Pros
The game compiles to a mere 10kB COM file, achieved through single translation unit compilation and aggressive GCC optimization, as highlighted in the README for maximizing code size efficiency.
Requires only 64kB of RAM and 64kB of video memory, making it runnable on extremely limited systems or within DOSBox emulation, aligning with its embedded system philosophy.
All game assets are embedded within the binary, eliminating the need for external files and simplifying distribution, as stated in the README's key features.
Optimized for joystick input and designed for DOS real-mode, providing a genuine retro gaming experience that targets DOSBox emulation for modern play.
Cons
The code is written in GCC's dialect of C and may not compile with other compilers, restricting toolchain flexibility and portability, as admitted in the README.
Building requires handling linker scripts and working around MinGW bugs with objdump, which can be tricky for developers unfamiliar with low-level toolchains, as noted in the README.
Primarily targets DOSBox emulation, with potential issues on actual DOS hardware, reducing its authenticity for retro purists and limiting native platform support.
Frequently Asked Questions
Related Projects
NetHackOfficial NetHack Git Repository
Floppy BirdFloppy Bird (OS)
Dungeons of NoudarA first person dungeon-crawler for DOS, written in C++, using software rendering and fixed point math
PtakovinaASCII Art Tetris
Found a gem we're missing?
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.