This one.
You simply drop the two files into the folder with the game's executable and run the game as normal. No setup or fuss is needed.
The fix disables the broken frame pacer (this is what made the game bounce down to 30 fps all the time for no apparent reason). It also fixes the enemy intel info text, allows you to uncap the frame rate (high frame rates can screw up the lip sync timings in cutscenes, though), removes the hot-plugging support (to keep the game from polling for a controller every second, causing it to stutter if one isn't plugged in), enables rumble, and works around the 1440p bug where the game would render at the wrong resolution. It also includes an older fix that keeps 2D elements from causing performance hiccups (by changing where the buffer gets allocated).
It works for 13-2 as well, but that game has some additional performance problems that aren't solved (though it is still dramatically better with the fix than without).
