The game originally used StarForce DRM. Some legacy fixes involved retrieving a serial number from a keygen, entering it into the StarForce activator to get a "Hardware Code," and then generating an activation key based on that specific hardware profile.

The kid looked at the code, then at Elias. "Why do you do this? For a five-dollar game?"

Even with the right code, you might face issues. Here is the fix for common bugs:

: Enemies have enlarged heads (Unlocked by beating the campaign on Easy). Double-Physics

The screen flickered. The fan on his computer whirred to life, sounding like a jet engine. The kid leaned in, eyes wide.