Unused Graphics

What better way to start off a series than by having a heap of unused crap lurking inside? Findings are sorted by whatever graphic comes first in the tile viewer.
Props goes to Ivo, V-King, tango_311, stoffhime1 and Magma Dragoon for finding a lot of this stuff.

Source: 6912 (8x8 view)

Not even Metal Slug escaped from William S. Sessons' campaign of drug awareness! ... except it goes entirely unused and isn't seen in-game at all. Whoops!

Source: 891 (8x8 view)

This cute little Slug turret is found at the end of the menu alphabet, and actually dates to a prototype of the game where you only played as the tank - see early footage for details!

Source: 896 (8x8 view)

And I can't find the right palette for this (it's meant to fade from yellow to red), but this is a health bar from the aforementioned early revision.

Source: 602

The very second sprites stored in the graphic data (right after the Rebels' landmine explosion); what seems to be an early hitspark for when the Metal Slug took damage.

Source: 658

S, G, H and M icons. Placeholders or early HUD icons for the weapons, presumably.


Source: 3360

A large, rotating Nazca Corporation logo (you'll have to take my word for it on the rotating part! check out Magma MK-II's sprite sheet for the full thing). The developers looked like they'd planned to make it clear as mud who was responsible for the game, but it goes unused.
A jingle and soundbyte for this alleged screen can be heard in the first track of the Metal Slug Complete Box soundtrack - thanks to Stefano for this factoid!

Source: 4587

Animations for the dogs from Mission 5 walking and sniffing, found by Ivo. You only ever see the dogs running in-game, though the early footage appears to show one of these animations in action.

Source: unknown

A teeny tiny flopping fish, found by Ivo. Might be used somewhere for all I know.

Source: unknown

Ivo found these barrels in the vicinity of Mission 2's graphics. Are they used anywhere?

Source: 4612

An elk. Presumably for use in Mission 3 or the ending movie scenes.
It appears in the Metal Slug Official Guide Book character chart, representing the decimated wildlife that have it out for Morden.

Source: 4694

A very peculiar sprite of an enemy soldier with a distinct uniform. No one seems to have found a fitting palette for it that colours the mouth and eye (visor?) correctly. This is the only animation it has, though there are copies of it rotated in around 10 directions. Ivo suggests it might be the character depicted in this concept art. It's possible!

Source: 5555

This stupid kid has appeared in all of the games' data, but not actually in gameplay. tango_311 provided the real palette.

Source: 5658

These three ladies only have one frame of animation each, and it goes without saying they're unused or else they wouldn't be on this page. It's also nigh-impossible to find decent palettes for them. tango_311 got these superior palettes for them, though the last two have rather punk colourations for rural villagers

source: 6644

The Metal Slug's tiles are arranged strangely so this animation is a bit splotchy, but it appears to be firing its cannon while crouched; using the bomb button while ducking will just throw a grenade. This appears to be a leftover from the early development when the Metal Slug was the only playable character; early footage suggests crouching and using the cannon would have fired a different projectile!

Source: 11339, 20057

The game is already dripping in rotated sprites... but I can't think of a purpose for these tilted splashes. There's a watery slope in Mission 1 but it just produces regular hitsparks, not splashes.

Source: 13719

What appears to be a cargo lift, probably for the Metal Slug or enemy tanks. Found by Ivo. Not sure what it woudld be supported on - a helicopter? A crane?

Source: 13913

The Metal Slug's vulcan cannon detached and sparking on the ground. One can assume this would happen after the tank is destroyed, but it explodes in mid-air no matter what.

Source: 16037

The Metal Slug has ludicrous amounts of rotations - more than are actually feasible in-game! This is but one example, there's way more than I could possibly cover. Thanks to Ivo for this trivia.

Source: 21352 (crouching)
Source: 21444 (standing)
Source: 21830 (hanging)
Source: 24731 (running)

In the game's early development, ally soldiers would have thrown pipe bombs rather than the enemies' psychedelic flashing pineapples. That feature was dropped and the pipebombs given to Marco and Tarma. Notably, there's an animation for a soldier running while throwing that was never modified for the enemies' grenades, a clear leftover from the game's original design.
Despite being unused, these sprites have been carried across to other games, and even appeared in promo materials like Metal Slug 3's manual!

source: 23448

A soldier exposing his tongue and plugging his ears. A taunt, or a reaction to an incoming enemy attack? Thanks to Divison 六 for pointing this out.
This animation later worked its way into Metal Slug Defense and Attack... as part of the soldiers' diving animation, for some reason.

Source: 24383

A variant of the knifing animation with the soldier snarling happily. I almost think it's used, but we all know how many times I've been wrong.
This was later reused for a Rebel variant in Metal Slug Attack.

source: 24824

The soldiers in floaties have animations for aiming and shooting diagonally, but they never do it! That's either very kind of them or very foolish. Cheers to Divison 六 for this find.

Source: 26603

An entirely unused tank is hidden inside the game! Its style is very reminiscent of In The Hunt and Gunforce 2, games made by Irem that apparently was made by the Metal Slug staff before moving over to Nazca.
Named the "KT-21" in concept art, Ivo believes it was an early version of the Di-Kokka (the rounded fat tanks) - its animations hit all the same beats, from its recoil-heavy fire, its wobbly movemeent, and its hatch opening when it's destroyed. The Di-Kokka even has an unused tank shell very similar to the one above, if you read on!



Source: 28844

In the game's early development there were no hairy POWs, but instead captive soldiers! See early footage for more on their behaviour. Though these GIFs use their usual palette, their uniforms would have been blue and changed hue depending on which player rescued them. This probably explains why the ending in 2-Player mode has the soldiers dancing and celebrating in the streets, despite the fact they were defeated.
These were later used in the console ports of Metal Slug and Metal Slug 3, Metal Slug Defense and Attack's menus, and were modified for the trainee soldiers in Metal Slug Advance.

Source: 30467

An unused shell found between the tiles for the Girida-O and the Iron Iso; it's possible they used this missile instead of cannonballs. I believe these remain unused in Metal Slug 2 and X.

source: 30762

Located after the Iron Iso's destroyed animations are these frames of its turret separated from its chassis.

Early footage suggests when destroyed its turret would have popped off, similar to the Girida-O.

Source: 30861

Found after the Iron Iso's graphics are these trailed projectiles... and immediately after them, the orbs the Iron Iso uses in-game for its projectiles.

Source: 31990

As far as I'm aware, the rock traps in Mission 1 can only be shot down but not totally disintegrated. Perhaps only the Slug's cannon was strong enough?

Source: 42942

What we have here is a Rebel soldier using a turret. Although they do use missile turrets in Mission 5, they don't use the same turrets you use in Mission 6. Has all the necessary animation, too!
Curiously, Marco and Tarma's turret animations immediately follow these sprites. All of their sprites are otherwise found at the very end of the sprite data in one organised lump.

source: 31096

A sandbag with a wider, shorter profile. Found in the first test stage and fully functional; thanks to Ivo for clueing me in!

Source: 43515

A parachute Ivo suggested belonged to a Slug. If true, there really must haven been more emphasis on the 'chutes early in production, what with all those animations for Marco and Tarma while parachuting. There's more frames, of course, but he couldn't be bothering ripping them. Wise man.

Source: 46529

An alternate set of turret graphics that has only one ammo box and faces only three directions. These are seen in early footage of Mission 6, manned by ally soldiers and ejecting bullet casings as they fire... which, conveniently, are located right next to this in the tile data.

Source: 52898

An armoured car with a tank's entrance hatch and sandbags, falling. Judging from the sandbags, I'm assuming these were for the stronghold in Mission 3, but that's very little to judge off.
Ivo also made a second version with a palette that actually existed in the game, but it looks like ass in my view. Diss!

Source: 54189

Ivo found this cannon shell near the Di-Kokka's graphics; the early footage shows them firing these instead of their trademark fireballs. The fireballs are among the last sprites in the game's data, just before Marco and Tarma.


Source: 57673

Rolling balls with Roman numerals inside of them? It's possible these were alternate projectiles for the Metal Slug, based off some early footage, though I'm not 100%. They are used as part of the debug dipswitches to keep track of how the Metal Slug and other tanks balance themselves on sloped terrain... but a single static frame is used, with none of the rolling animations.


Source: 69814

Unused gun emplacements. The left one is static, but the latter can face in five downward directions. Ivo and Dave found these in the vicinity of Mission 1's boss graphics...

... and early footage shows they originally placed on the wings and shot at the players - or could be hijacked by friendly NPCs! It's unclear how fast or what properties their missiles would've had, but it might've been a bit hectic for a first mission boss!


Source: 77167, 79350

Alternate crouch throwing animations for Marco and Tarma. These animations have lasted up to Metal Slug 5, and even Fio and and Eri were given similar animations in their debut... but not once are they ever used.




Source: 77211, 77584, 77955




Source: 77325, 77345, 77840, 79514

Ivo found animations of the characters shooting and throwing things in many directions while in the air, but I got these and animated them. It appears that the characters would've been more flexible, turning from every angle, instead of just turning their whole body around to whatever direction.
What's interesting is that just about all of these animations are still in the game! When your character parachutes in (in Missions 1, 2 and 6), release them from the parachute, aim left, and fire. Throwing grenades also works, and the Combat School in the console ports allows the machine gun wielding animations to be used thanks to you keeping your weapon after finishing a level. Thanks to V-King for most of this info.




Source: 77612, 77631, 77680, 78390, 78444

These turning animations, however, cannot be seen in-game.
Some of these animations were modified and repurposed for the unused helper character in Metal Slug 5.


Source: 77623

Alternate aiming upwards?

Source: 77555

Unused graphics for looking up and turning while shooting.

Source: UNKNOWN

This cartoony grenade-juggling monkey lurks among the HUD and the text, and appears there in just about every instalment (at least, I'm sure it used to - have newer ROM dumps excised it?). It's used on the loading screens of the original console ports of the first two games.


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