Halo Combat Evolved Weapons:

MA5B Assault Rifle
M6D Assault Pistol
M9 Grenade
M19 SSM Rocket Launcer
M90 Shotgun
S2 AM Sniper Rifle
Halo 2 Weapons:
M7/Caseless Sub Machina Gun
M6C Pistol
BR55 Battle Rifle
M90 Shotgun
S2 AM Sniper Rifle
M19 SSM Rocket Launcer
M9 HE-DP Grenade
Halo 3 Weapons:
MA5C ICWS Assault Rifle
BR55 Battle Rifle
M6G Pistol
M7/Caseless Sub Machina Gun
M41 Rocket Launcer
M90 Shotgun
SRS99D Sniper Rifle
WAV M6 GGNR Spartan Laser
M9-HE DP [...]