''Fire Barrel'' (also known as ''Air Assault'') is a rather obscure [[VerticalScrollingShooter vertical-scrolling]] ShootEmUp made by Creator/{{Irem}} in 1993. The game bears many similarities to ''{{Raiden}}'', such as weapon types and the overall feel of it. Though it barely resembles it, the game is meant to be a sequel of sort to ''Air Duel''.

Otherwise, it's a somewhat [[SoOkayItsAverage okay-to good]] game with {{awesome music}}.

* AnticlimaxBoss: With a strong weapon, it is possible to beat the final part of the FinalBoss without letting him fire even once.
* FollowTheLeader: To ''{{Raiden}}''.
* GiantMook: Several, such as large helicopters and tanks.
* HomingProjectile: The Homing Missile weapon, which homes in on enemies but does less damage than the dumbfire Megaton Missile weapon.
* MoreDakka: The Vulcan Gun weapon.
* MutuallyExclusivePowerups: The main weapon powerups, as well as the Missile weapon powerups.
* NintendoHard
* NonIndicativeName: The Grenade Weapon shoots spreads of '''rockets''' in 5 directions.
* SequentialBoss: The FinalBoss.
* SmartBomb: But of course.
* SpreadShot: Two kinds: The Wing Gun and Grenade. The Wing Gun shoots up to seven crescent projectiles forwards, while the Grenade shoots rockets forwards, to the sides, and to the rear of the player.
* WaveMotionGun: The blue weapon (Graviton Laser). Seems like an expy of the blue laser weapon from Raiden.