Quaternary Fire is generally used to refer to the fourth firing mode for weapons in first person shooters (FPSs). Gamers are forever demanding more weapon selection options in their games and in response developers have moved from single-mode weapons to those with secondary modes, tertiary modes and now quaternary modes. With up to ten weapons in FPSs each with four modes sometimes developers are hard-pressed to provide a consistent experience. Some recent weapons with quaternary fire have included:

Sidearm

1. Hand pistol
2. Dual-wield pistols
3. Scoped dual-wield pistols
4. Tri-wield pistols

Shotgun

1. Pump-action shotgun
2. Double barrel shotgun
3. Triple barrel shotgun
4. Double-stocked shotgun

Sniper Rifle

1. AWP
2. AWP with armor-piercing bullets
3. AWP with exploding bullets
4. AWP with long-distance bayonet

Bio-Rifle

1. Single shot
2. Chargeable bio blobs
3. Proximity bio mines
4. Ennui-seeking blobs

Lightning Gun

1. Single bolt
2. Wide-arc lightning
3. Sustained lightning
4. Mood lightning

Grenade

1. High explosive grenade
2. Incendiary grenade
3. C4
4. Rip Taylor confetti bomb

Medikit

1. Field kit
2. Stem packs
3. Adrenaline
4. Werther’s Original