old thread, and still an open case. i'm putting this to rest. the sound file is legitimate. it really is J.K. Simmons, not an imitator. It is from the Perpetual Testing Initiative DLC in which the player character is sent to test in the "Multiverse", where there are infinitely many different Aperture Sciences and infinitely many Cave Johnsons. Now, first off, the sound file on this blappeture site is edited. in the actual dlc, this alternate universe cave doesn't say his code to identify him as "Cave Prime" (the Cave Johnson from our universe), but on the site, the message begins with "Chariots chariots" (the codewords). So Aperture Science buying out Black Mesa, (and renaming it Blaperture Science. c'mon, that horrible misspelling should have made it obvious) and shutting down Anomalous Materials is in a different universe, and not ours. (and let it be known that the Perpetual Testing Initiative universe is also not the main storyline of Portal 2's universe either, since partway through the dlc story, Cave has Greg instead of Caroline as an assistant, and he even cancels the Genetic Life form and Disc Operating System initiative (GLaDOS), therefore cutting her existence. Anyways, the gist is, real sound file, real Cave Johnson and Aperture Science buying Black Mesa and stopping the Resonance Cascade, different parallel universe. Not some sort of ploy from valve to coincide Portal 3 and Half Life 3 (although that may have already been done because of the whole Borealis thing) Don't care that i'm sure nobody frequents this thread anymore.