|Game Title:||Commander Keen 4: Secret of the Oracle|
Commander Keen 4: Secret of the Oracle is a Action game published by Apogee Software released on 1991 for the MS-DOS.
Commander Keen: "Goodbye, Galaxy!" contains 2 chapters: chapter four "Secret of the Oracle" and chapter five "The Armageddon Machine". This is Chapter 4. Keen Dreams is considered chapter 3.5 and for chapters 1, 2 and 3 see Invasion of the Vorticons.
How to play Commander Keen 4: Secret of the Oracle (DOS):
Extract the zip file and drag KEEN4E.EXE into DOSBox shorcut.