The monolith is a bonus grenade unlocked upon completing Metal Slug 3D once.
The monolith, when thrown, shoots a beam into space, and then brings down a big tablet crushing any tanks or people under it. The only bad part is you have to wait a few seconds for it to take effect.
- This grenade is most likely based on the Metal Slug 3 boss The Ten Commandments of Moses, which uses a nearly identical attack.
- It is possibly a reference to the film 2001: A Space Odyssey.
|Standard||Handgun (Murder .50AE | Murder Model-1915 .38 Mk.1Am) | AR-10 | M-3685 | M60|
|Limited||Heavy Machine Gun | Rocket Launcher | Flame Shot | Shotgun | Laser Gun | Special Shot | Grenade Gun | Iron Lizard | Super Grenade | Enemy Chaser | Drop Shot | Two Machine Guns | Zantetsu Sword | Thunder Shot | Machine Gun | Missile Pod | Sniper Rifle|
|Bombs||Grenade | Fire Bomb | Stone | Earring Bomb | Smoke Bomb | Monolith | Snowball|
|Melee||Knife | Tonfa | Hatchet | Tomahawk | Punching Glove | Stun Gun | Wrench | Vulcan Punch | Argentine Backbreaker | Moon Slasher|
|Other||AA Machine Gun | Thunder Cloud | Mobile Satellite|