From Exodus3000 Wiki

The fourth weapon upgrade available from an outpost.

Weapons | Defense | Intelligence | Security | Radar
Levels 1-5	Stunner | Disruptor | Grond | Lightsaber | Moritaa
Levels 6-10	Phaser | Thunderbolt | Keyblade | Plasma Rifle | Forcelance
Levels 11-15	Chaingun | Batarang | Nailgun | Death Ray | Gauss Rifle
Levels 16-20	Tau Cannon | Pulse Rifle | Noisy Cricket | Zat | Ultimate Weapon
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