X-COM: Apocalypse/Removed Items

The original concept of the game had many things that had to be removed from the final release:

• The Heavy Launcher AG Missile,Minilauncher AG Missile ,Alien Gas Grenade are in the game but you need every alien alive and dead including a live alien queen.
• The Energy Pod is also in the game and it can be gained by raiding Transtellar.
• The mind shield is also technically in the game , you can get it by raiding Marsec, WIELDING & activating it (like you would with a grenade) increases one agents PSI Defense in combat by 30 points. If you abort/leave/complete a mission, while the mind shield is in your hand and active, the 30 point PSI Defense boost becomes permanent, granting a free 30 points to PSI Defense. Repeat until all of your agents have 200 PSI Defense, which is the maximum it will get to. :D
• Tracker Gun
• Tracker Gun Clip
• Multi Tracker
• PSI Grenade
• ForceWeb
• Dimension Distabilizer Gun
• Dimension Force Field
• Alien Detector

Also, the original worldmap had to be cut down to just one megacity. This explains the many types of vehicles in the game, where most of them are quite useless in just one city.