Abandonware DOS title

The most popular science fiction games

Time travel, space wars, alien empires, alternate universe, cyberpunk anti-heroes, space invaders, post-apocalyptic worlds, dystopian societies, mad scientists, galaxies far far away, strange new worlds, mech battles, deep space exploration, evil robots... should I go on?
operation-inner-space-03

Operation: Inner Space

Windows 3.x1994protecteddemo3.7/5 Software Dynamics
outbound-02

Outbound

Windows XP/98/952001freeware3.9/5
flash-gordon-ita-07

Flash Gordon: Il Rapimento di Dale

DOS19923.7/5 Holodream Software
tau-ceti-02

Tau Ceti

DOS19874.1/5 Thunder Mountain
battlechess4000-1

Battle Chess 4000

DOS1992protected4/5 Interplay Productions
bloodnet-4

BloodNet

DOS1993protected4/5 MicroProse Software
BloodNet is a blend of point & click adventure (it has puzzles and an adventure style dialogue system) and RPG (player statistics, combat, random encounters), set in a dark cyberpunk New York. BloodNet was developed and published by MicroProse software in 1993. You are Ransom Stark who's goal in the game is to defeat a vampire called Van Helsin...
ascii-sector-02

Ascii Sector

WindowsLinuxDOS2007freeware3.9/5
xtrek91-02

Xtrek

DOS1991freewareNSFW4/5
masteroforion-5

Master of Orion

DOS1993protected4.1/5 SimTex
astrotit-1

Astrotit

DOS1987NSFW3.5/5 Rudeware
inextremis-1

In Extremis

DOS19933.5/5 Blue sphere
manhunter-new-york-4

Manhunter: New York

DOS19883.8/5 Evryware
shadoworlds-02

Shadoworlds

DOS1993protected4/5 Teque
mechwarrior-2-06

Mechwarrior 2: 31st Century Combat

DOS19953.9/5 Activision
dream-zone-02

Dream Zone

DOS19884.2/5 Naughty Dog
ultimatedoom-1

Ultimate Doom

DOS1995protected4.1/5 id software
space-federation-07

Space Federation

DOS19944.3/5 Interplay Productions
mechwarrior-1

Mechwarrior

DOS19893.7/5 Dynamix
star-wars-2-04

Star Wars 2

DOS19894.1/5
manhunter2-1

Manhunter 2: San Francisco

DOSMac OS19894/5 Evryware
bio-menace-2-07

Bio Menace Episode 2: The Hidden Lab

DOS1993freeware4.2/5 Apogee Software
keen4-1

Commander Keen 4: Secret of the Oracle

DOS1991protected4/5 id software
anacreon-1

Anacreon: Reconstruction 4021

DOS1987freeware3.9/5 Thinking Machine Associates
Anacreon: Reconstruction 4021 is one of the first 4x turn-based strategy games, ASCII based. Anacreon is set in space, as most 4x sci-fi games are, and was published by Thinking Machines Associates and designed by George Moromisato who later re-released the game as freeware.
keen3-1

Commander Keen 3: Keen Must Die!

DOS1990protected4.2/5 id software
champ-asteroids-01

CHAMP Asteroids

DOS1997remake3.9/5 ChamProgramming corp.
terminalvelocity-3

Terminal Velocity

Windows XP/98/95DOSLinuxMac OS1995protected3.9/5 Terminal Reality
2400ad-4

2400 A.D.

DOS19884/5 Origin Systems
megatraveller2-1

MegaTraveller 2: Quest for the Ancients

DOS19913.6/5 Paragon Software
MegaTraveller 2: Quest for the Ancients is the sequel to MegaTraveller 1: The Zhodani Conspiracy. It is a science fiction role-playing game (RPG) released in 1991, developed by Paragon Software. Like its predecessor, MegaTraveller 2 is set in the expansive Traveller universe.In MegaTraveller 2, players continue their journey in the Third Imperium, ...