Hacking doom for fun, health and ammo

This report details a hands-on reverse engineering project on Chocolate Doom, showing how to locate and alter game logic for ammo and health using tools like CheatEngine/scanmem, IDA, gdb, and Frida. The authors identify key instructions and functions, dynamically intercept and patch opcodes (e.g., converting SUB to ADD), and hook the game’s cheat comparison routine to implement and toggle custom cheats at runtime, all without modifying the original binary on disk.