- 911-CID
- AM-715
- Achilles targeting unit
- Adamantium
- Adamantium armor
- Adrian
- Advanced city planning
- Advanced colony ship
- Advanced construction
- Advanced data center
- Advanced engineering
- Advanced fusion
- Advanced government
- Advanced magnetism
- Advanced military outpost
- Advanced robotics
- Advanced space factory
- Advanced tactics
- Ae
- Aelia
- Ailis
- Aisbog
- Akirian
- Alceste
- Alien management center
- Alkari
- Altos
- Amandine
- Amem
- Amoeba
- Anaerobic colonies
- Androgena
- Anele
- Anka
- Anna North
- Anomalies
- Antaran portal generator
- Antaran ruin
- Antarans
- Anti-gravity harness
- Anti-matter bomb
- Anti-matter drive
- Anti-matter fission
- Anti-matter torpedoes
- Anti-missile rockets
- Aquasarrious
- Ariaa
- Arid
- Armies
- Armor barracks
- Arne
- Artemis system net
- Artifacts
- Artificial consciousness
- Artificial gravity
- Artificial intelligence
- Artificial life
- Artificial planet construction
- Ash
- Aster
- Asteroid belt
- Asteroid field
- Asteroid laboratory
- Asteroid mine
- Astro biology
- Astro construction
- Astro engineering
- Astro university
- Ateek
- Atheer
- Atl
- Atmospheric renewer
- Audrieh
- Augmented engines
- Aurya
- Autolab
- Automated factory
- Automated repair unit
- Avian
- Axelle
- Axelsson
- BC
- Balbar
- Barren
- Bata
- Battle pods
- Battle scanner
- Battle station
- Battleoids
- Battleship
- Bio terminator
- Biology
- Biomes
- Biomorphic fungi
- Biospheres
- Biotechnology
- Black Razor
- Black hole generator
- Bomber
- Bomber bays
- Brainiac
- Bror
- Bulrathi
- Caern
- Caius
- Camile
- Capitol
- Cassandra
- Cavernous
- Cavernous transformation
- Celeus
- Centralized customs dispatch
- Chan
- Chance Valheim
- Chug
- Civil transport
- Class III shield
- Class I shield
- Class VII shield
- Class V shield
- Class X shield
- Claw
- Cloaking device
- Cloning center
- Colonial production
- Colonial revenue services
- Colonies
- Colonization
- Colony base
- Colony combat
- Colony projects
- Colony ship
- Colony structures
- Combat
- Command points
- Connor
- Core waste dump
- Corgi
- Coronaa
- Crassis
- Credits
- Cruiser
- Crust prospecting
- Cyber security link
- Cybertechnics
- Cybertronic computer
- Cybertronics
- Cynoid
- Cyr
- Dalan
- Dantos
- Dark quartz
- Darlok
- Dasya
- Daza
- Death ray
- Death spores
- Declaring War When Under Treaty
- Deep-sea cooling
- Deep core mine
- Deep scanner
- Deep sea cooling
- Deep space exploration
- Degonite
- Democracy
- Desert
- Destroyer
- Deuterium
- Diablo
- Dictatorship
- Difficulty
- Dimensional portal
- Dina
- Diplomacy
- Diplomacy in Master of Orion II: Battle at Antares
- Diplomatic actions
- Diplomatic states
- Diplomatic treaties
- Displacement device
- Disruptor cannon
- Distortion fields
- Doom Star
- Draxx
- Drusilla
- ECM jammer
- Economics
- Economy
- Edita
- Einar
- Eldritch
- Electra
- Electromagnetic refraction
- Electronic computer
- Electronics
- Elerian
- Elina
- Emo
- Empire management
- Energy absorber
- Engineering
- Enigma
- Eoladi
- Erth
- Espionage training facility
- Evolving technologies
- Evon
- Evrard
- FAQ
- Farming
- Fast missile racks
- Felina
- Feudalism
- Fighter
- Fighter bays
- Fighter garrison
- Finn
- Fleet management
- Fluffy
- Fohnn
- Food
- Food replicators
- Frigate
- Fuel cells
- Fungal farms
- Fusion beam
- Fusion bomb
- Fusion drive
- Fusion weapons
- GNN
- Gaia
- Gaia transformation
- Galactic Setup
- Galactic council
- Galactic currency exchange
- Galactic cybernet node
- Galactic economics
- Galactic networking
- Galactic trading
- Galaxy
- Galaxy age
- Galaxy size
- Galis
- Garron
- Gas giant
- Gas giant compression
- Gauss cannon
- Gem
- General Jiang
- Genetic engineering
- Genetic mutations
- Geosynchronic warehouse
- Gizmo
- Glis
- Global DNA scanner
- Glossary
- Gnolam
- Gold
- Government
- Government (technology)
- Government support facility
- Grak
- Grassland
- Grassland transformation
- Gravitic fields
- Graviton beam
- Gravity
- Gravity generators
- Grendarl
- Grogg
- Ground batteries
- Ground missile base
- Grum
- Guardian
- Gunther
- Gyro destabilizer
- Haidar
- Hard shields
- Hawk
- Heavy armor
- Heavy fighter
- Heavy fighter bays
- Heightened intelligence
- Helium
- High energy distribution
- High energy focus
- High orbit sonar
- Holo simulator
- Homeworld
- Horatius
- Houri
- Human
- Hydra
- Hydroponic farm
- Hyper-X capacitors
- Hyper dimensional fission
- Hyper drive
- Hyperplanar transfer tracking premises
- Hyperspace communications
- Hyperspace sensors
- INT-89
- Ikaroa
- Imsaeis
- Independent civilizations
- Industry
- Inertial nullifier
- Inertial stabilizer
- Inferno
- Inferno transformation
- Inna
- Interphased drive
- Interphased fission
- Interplanetary administration
- Interplanetary security network
- Interplanetary stock exchange
- Interstellar Stock Exchange
- Interstellar stock exchange
- Ion drive
- Ion fission
- Ion pulse beam
- Iridium
- Ithkul
- Ixtli
- Izula
- Jarred
- Johanna
- Jump gate
- Kara
- Karg
- Katja
- Kaviqra
- Kei
- Kher
- Khunagg
- Kiiriki
- Kimbuzzi
- Kirsi
- Kirsus
- Kiyomi
- Klackon
- Kronos
- Kurt
- Kytryl
- Lapis
- Laser cannon
- Laser rifle
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