Laser Weapons      Heavy      Heavy         Plasma    Plasma
       |             Plasma   Plasma Clip      Rifle   Rifle Clip
  Laser Pistol          |___________|            |__________|
       |                       |                       |
  Laser Rifle                  |                       |
       |                       |__________OR___________|
  Heavy Laser                             |
       |                                  |
  Laser Cannon                      Plasma Cannon
(Tank/Laser Cannon)               (Hovertank/Plasma)
       |                                  |
  Laser Defense                     Plasma Defense


             Alien Alloys                   Blaster      Blaster
                  |                          Launcher     Bombs
Elerium 115  Personal Armor  UFO Power Source   |___________|
    |_____________|_________________|                  |
                  |                              Fusion Ball
                  |                           Hovertank/Launcher)
             Power Suit      UFO Navigation            |
                  |_________________|         Fusion Ball Defense
                           |
                     Flying Suit


Alien    Elerium        UFO            UFO
Alloys      115     Power Source   Navigation
 |___________|___________|______________|
                   |
                  UFO
              Construction
                   |
                  New
             Fighter Craft
              (Firestorm)
                   |
                  New
           Fighter-Transporter
              (Lightning)
         __________|____________
         |                      |
        Grav                 Ultimate
       Shield                 Craft
                             (Avenger)

Alien -------------- Alien Origins
Alien Medic -------- species information
Alien Leader ------- The Martian Solution
Alien Commander ---- Cydonia or Bust
Alien Navigator ---- Hyper-Wave Decoder
Any Ethereal or
Sectoid Leader ----- Psionic Laboratory
                 ___________|____________
                 |                       |
           Mind Shield                 Psi-Amp