There are three weapon types, each split into three categories. When you run over a weapon, you will automatically pick it up if it's a ligher level; otherwise, you will have to manually pick it up.
NOTE: The crosshair is off center if you choose a resolution other than 640x480.
The ballistic weaponry in the game use bullets as their ammunition.
AVR-9 "Avenger" Light Slug Cannon
IR-9000 "Iron Roar" Assault Cannon
CR-80 "Cyclone" Saturation Cannon
Tier 4 Siege Cannon
Fires an artillery shell in a parabolic arc, which then explodes.
The energy weaponry uses cell packs.
The missile launcher uses rockets that you have collected.
SBR-80 "Shrieker" Rocket Launcher
This system is an unguided missile system that fires a non-homing heavy explosive rocket.
Stone Dog Guided Missile System
Fires fire and forget missiles that home in relentlessly once a target has been locked into its seeker array. Carrying a hydrogen plasma warhead, they cause damage through explosive effect and heat.
Valhalla Class Rocket Launcher
Fires nonhoming multi-warhead missiles that separate a short distance after launch and rain down death and destruction over a wide area.
Note: If you are playing on hard difficulty, you need this weapon to complete the game.
Zulu Engagement Missile System
The Tier 4 missile launcher will automatically lock onto multiple targets, and fire up to four missiles at once.
Note: This weapon is inoperable at high screen resolutions. While you can still obtain a lock, the enemies have to be in the top-left corner of the screen.