>If they knew what the next number to be pulled from the random number generator was, they could, for example, delay firing a weapon by a frame or two, to get more damage. Probably other more interesting things I can't think of immediately. If there was ever a bot vs bot Doom competition, this is something you'd definitely want to consider.
If you're interested in that kind of stuff, check out tasvideos.org, a community dedicated to beating old videogames as fast as possible using that type of knowledge. Since all videogame 'randomness' is really deterministic pseudo-randomness, the kind of RNG-knowing you described is ubiquitous
In fact, by coincidence, it looks like someone just recently published a DOOM (second episode) run: http://tasvideos.org/2825M.html
Also a coincidence: me and my brother used to do cooperative 2-player speeed-runs of Doom/Doom2 as part of a thing called "H2HMud". We had a setup which consisted of a fast 486, and a really slow 386. It ran really slowly - about 1/4 normal rate when you woke up a room full of entities. The 486, however, rendered every frame, which meant the person on the fast machine could happily pick every off pixel-perfect, while the slower machine player would do "support" stuff (flip switches).
I wondered what the "limit" would be if you could slow it down arbitrarily, and re-stitch, and I guess that's what it looks like in the video you posted. Thanks!
My favourite example: http://tasvideos.org/1145M.html completing a game in under 10 seconds by manipulating the RNG to spawn the final quest completion item under the player's initial spawn point.
If you're interested in that kind of stuff, check out tasvideos.org, a community dedicated to beating old videogames as fast as possible using that type of knowledge. Since all videogame 'randomness' is really deterministic pseudo-randomness, the kind of RNG-knowing you described is ubiquitous
In fact, by coincidence, it looks like someone just recently published a DOOM (second episode) run: http://tasvideos.org/2825M.html