Software Adventure Games - The Light

Description:

You play as Maurice L.
Shelby, a laboratory apprentice employed by Commission Research Station 12B.
The station is rather important: it houses one of several beacons placed around the world that generate the dimensional field that prevents total disaster.
(It's a long story.) Unfortunately, you'll learn that one of the researchers has gone mad and stolen the beacon's phase modulator! The entire planet is doomed unless you can retrieve the modulator and restore the field.