«The UAC's primary data center has been invaded by the monsters of hell in order to steal some intelligence and ultimately wipe out the human race. The center's population has been wiped out and you are the only hope of reclaiming the UAC's secrets from the demons. Find the source of the infestation before the monsters are able to use our secrets against us.» — ReadMe.txt
Footnote: Due to a couple of inaccessible secrets, plus an egregious softlock on MAP03, playing on the ZDoom family of ports is generally recommended. Others may try the fixed limit-removing version, list of changes is included.
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