Decompiling

[XTF]

How do you imagine this recompiled stuff should be connected to the game? Replace the first instruction of the original function with a JMP to the new one? Syringe can do that.

For example

Assembly output should be fairly simple with IDA - last weekend I started writing (for other purposes) an IDA plugin to spit out the asm instructions from a function without any decorations IDA normally places around them, wrapping that in __asm {} would be all that's needed for a start. But I really doubt that that approach would get you comprehensible code faster than Hex Rays does.

What about generating function prototypes and pointers (so the originals can be called) and variable types and definitions?

BTW, does IDA allow you to put the 'DB' into version control and to merge two DBs?