No Force in the Universe

Taking a shot at filling my own prompt on avengerkink:

In an AU, instead of taking out Tony's arc-reactor, Obadiah Stane kidnapped Tony, faked his death in a "lab accident", imprisoned him, and forced him to design weapons for Stane.

Bruce is going about his day hacking Stark Industries to learn more about the Hulkbuster weapons when he comes across some discrepancies in the code--subtle things, like inefficient loops in otherwise streamlined code, bizarre variable names, or incorrect comments.

Intrigued, he goes through all the code of SI's weapons industry, comes up with a pattern, and finds the messages Tony has been hiding in the code.

And then he goes and busts Tony out. Lots of badassery, including on Tony's part--he may be defeated, but he's not broken.