1. Any research
1.1. Medkit
1.1.1. Advanced medikit
2. Killing aliens
2.1. Era 1
2.1.1. Larva (alien race)
2.1.1.1. Chemical grenade (grenade)
2.1.1.1.1. Stun grenade (grenade)
2.1.1.1.2. Chemical rocket (rocket)
2.1.1.1.3. Chemogun (personal weapon)
2.1.2. Chaser (alien race)
2.1.2.1. Laser pistol (personal weapon)
2.1.2.1.1. Laser rifle (personal weapon)
2.1.3. Attenuator (alien race)
2.1.3.1. Phosphorous grenade
2.1.3.1.1. Incendiary rocket (rocket)
2.1.3.1.2. Tank mortar (vehicle)
2.1.3.1.3. Flamethrower (personal weapon)
2.1.4. Hallucinoid (alien race)
2.1.4.1. Mind shield (mind shield)
2.1.5. Vipon (alien race)
2.1.5.1. Fire hammer (ship rocket)
2.1.5.2. Desert hunter (vehicle)
2.2. Era 2
2.2.1. Kinglarva (alien race)
2.2.1.1. Chemical grenade mk. II
2.2.1.1.1. Stun grenade mk.II
2.2.1.1.2. Chemical rocket mk. II
2.2.1.1.3. Chemogun ammo mk.II
2.2.2. Destroyer (alien race)
2.2.2.1. Magnetic pistol (personal weapon)
2.2.2.1.1. Magnetic rifle (personal weapon)
2.2.2.1.2. Advanced grenade (grenade)
2.2.3. Hardened Attenuator (alien race)
2.2.3.1. Incendiary grenade mk.II
2.2.3.1.1. Flamethrower ammo mk.II
2.2.3.1.2. Incendiary rocket mk.II
2.2.4. Sentinel (alien race)
2.2.4.1. Jetpack (jetpack)
2.2.4.2. Cyclops (vehicle)
2.3. Era 3
2.3.1. Trilobit (alien race)
2.3.1.1. Long lance (ship rocket)
2.3.1.2. Gladiator (vehicle)
2.3.2. Telemat (alien race)
2.3.2.1. Chemical grenade Mk.III
2.3.2.1.1. Stun grenade mk.III
2.3.2.1.2. Chemical rocket mk.III
2.3.2.1.3. Chemogun ammo mk.III
2.3.3. Lobotomic (alien race)
2.3.3.1. Plasma Rocklets (rocket launcher ammo)
2.3.3.2. Gauss Rocklets (rocket launcher ammo)
2.3.3.3. Dragon Rocklets (rocket launcher ammo)
2.3.4. Observer (alien race)
2.3.4.1. Beam plasma rifle (personal weapon)
2.3.4.1.1. Plasma shield (ship shield)
2.3.4.1.2. Plasma grenade mk.II (grenade)
2.3.5. Preacher (alien race)
2.3.5.1. Advanced mind shield (mind shield)
2.3.5.2. Incendiary grenade mk.III
2.3.5.2.1. Flamethrower ammo mk.III
2.3.5.2.2. Incendiary rocket mk.III
2.4. Era 4
2.4.1. Phantom (alien race)
2.4.1.1. Personal anti-grav device (personal anti-grav)
2.4.1.2. Particle pistol (personal weapon)
2.4.1.2.1. Particle rifle (personal weapon)
2.4.1.2.2. Antimatter grenade (grenade)
2.4.2. Inquisitor (alien race)
2.4.2.1. Caustic grenade
2.4.2.1.1. Caustic rocket (rocket)
2.4.2.1.2. Oniric grenade (grenade)
2.4.2.2. Calciner grenade (grenade)
2.4.2.2.1. Calciner rocket (rocket)
2.4.2.2.2. Calciner flamethrower ammo (ammo)
2.4.3. Hardened Lobotomic (alien race)
2.4.3.1. Desert Tortoise (personal armor)
2.4.3.2. Antimatter rocklets (rocket launcher ammo)
2.4.4. Terror floater (alien race)
2.4.4.1. Hammer (vehicle)
3. Capturing aliens
3.1. Alien Live Forms
3.1.1. Capturing alien commanders
3.1.1.1. Alien origins
3.1.1.1.1. The Alien Mothership
3.1.1.1.2. Plasma pistol (personal weapon)
4. Finishing ufo missions
4.1. Scout (alien ship)
4.1.1. Ufo craft armor (alien artefact)
4.1.1.1. Lightning (ship)
4.1.1.2. Beekeeper Bk 1 (personal armor)
4.1.2. Ufo flight control (alien artefact)
4.1.2.1. Advanced detection system (building)
4.1.3. Ufo gravity engine (alien artefact)
4.1.3.1. Proyect Kentaurus
4.1.3.1.1. Kentaurus generator
4.1.3.1.2. Kentaurus spaceship alloys
4.1.3.1.3. Kentaurus engines
4.1.3.1.4. Kentaurus landing and storage platform
4.1.3.1.5. Kentaurus distribution point
4.1.3.1.6. Kentaurus hybernation room
4.1.3.1.7. Kentaurus navigation room
4.1.3.1.8. Kentaurus laboratory
4.2. Fighter (alien ship)
4.2.1. Ufo alien berth (alien artefact)
4.2.1.1. Surgery (building)
4.2.1.1.1. Advanced laboratory (building)
4.2.2. Thunder (transport)
4.3. Cruiser (alien ship)
4.3.1. Ufo power distribution (alien artefact)
4.3.1.1. Stormbringer (ship)
4.3.1.2. Advanced workshop (building)
4.3.2. Ufo gravity control (alien artefact)
4.4. Battle cruiser (alien ship)
4.4.1. Ufo advanced craft armor (alien artefact)
4.4.1.1. Desert Viper (personal armor)
4.4.1.2. Waspkeeper Vk II (personal armor)
4.4.2. Advanced flight control (alien artefact)
4.4.2.1. Exterminator (ship)
4.4.2.1.1. Sky diver (transport)
4.4.3. Ufo reactor (alien artefact)
4.4.3.1. Nightwolf (ship)
4.5. Battleship (alien ship)
4.5.1. Ufo freezing unit (alien artefact)
4.5.2. Ufo space flight computer (alien artefact)
4.5.2.1. JAG-D1 (ship)
4.5.2.1.1. Devil fish (transport)
4.5.3. Ufo energy accumulator (alien artefact)