Hey there! As someone who's been down this reverse engineering road with games, let's walk through the most common reasons you're hitting this roadblock and how to fix them:

1. You're dealing with ASLR (Address Space Layout Randomization) #

Most modern games enable ASLR, which randomizes the base address of executable modules every time the game launches. This means the runtime memory address you find won't line up with the static addresses IDA shows when you first load the binary.

Fix steps:

• Attach IDA to the running game process (Debugger > Attach to process)
• Once attached, IDA will automatically sync the runtime base addresses. Verify this in the Segments window (View > Open subviews > Segments) — the Base column will now show live runtime addresses instead of static defaults.
• If you need to manually rebase, go to Edit > Segments > Rebase program, enter the runtime base address of the game module, and click OK.

2. You haven't switched to IDA's debugging mode #

Unlike OllyDBG (a dedicated dynamic debugger), IDA starts in static analysis mode by default. Loading the game binary without attaching to the running process only shows pre-ASLR static addresses — not the live runtime memory you're seeing in your memory search.

Fix steps:

• Load the game's .exe or target .dll into IDA and let it finish initial auto-analysis.
• Launch the game (or attach to it if it's already running) via IDA's debugger menu.
• Once in debug mode, use the Jump to address feature (G key) and paste your runtime address — you'll now see the corresponding live assembly code, just like in OllyDBG.

3. The game is packed/obfuscated #

Many games use packers (like UPX, Themida) or custom obfuscation to protect their code. Loading the packed binary statically into IDA only shows the unpacker code, not the actual game logic that gets decrypted and loaded into memory at runtime.

Fix steps:

• Attach IDA to the running game and let the unpacker finish executing (set a breakpoint on VirtualAlloc or wait until the main game module is fully loaded).
• Once the real code is in memory, use IDA's memory dumping feature (Debugger > Dump debugged process) to save the decrypted module.
• Load this dumped module into IDA for proper static analysis, or continue debugging directly in the live process.

4. The code is dynamically generated (JIT/on-the-fly patches) #

Some games use JIT compilers for scripting (like Lua, Unity IL2CPP) or apply dynamic memory patches during runtime. These code regions don't exist in the static binary, so IDA won't recognize them until you're in debug mode and the memory is allocated.

Fix steps:

• When you find the runtime address of this dynamic code in IDA's debug view, right-click the address and select Convert to code (C key) to force IDA to disassemble it.
• If the region isn't marked as executable, go to Edit > Segments > Change segment attributes to mark it as code-executable — this helps IDA properly analyze the region.

内容的提问来源于stack exchange，提问作者pharaon