Metal Slug 4

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Metal Slug 4
Metal Slug 4 (insert).jpg
Cover art
Developer(s)Mega Enterprise/BrezzaSoft/Noise Factory/Playmore
Noise Factory
Producer(s)Hong Ick Cho (Mega)
Keiko Iju (Noise Factory)
Joo Hwan Sohn (character designer)
Yong Hee Lee(background designer)
  • Masahiro Maeda
  • Yoshikazu Nishikawa
  • Nana Maeda
  • Kentaro Hayashi
  • Ryo Fujii (character designers)
  • Reiko Nagasima
  • Nami Takasaki (background designers)
Programmer(s)Hiroshi Hishikawa (main)
Kazuaki Ezato (sub)
  • Tonko
  • Naohisa Yamaguchi
  • Masayuki Fukuoka
Composer(s)Toshikazu Tanaka
SeriesMetal Slug
Neo Geo
PlayStation 2
Virtual Console
Nintendo Switch
ReleaseNeo Geo
June 12, 2002
Virtual Console
  • JP: November 20, 2012
  • NA: January 31, 2013
  • PAL: March 7, 2013
Genre(s)Run and gun
Mode(s)Single-player, 2 player co-op
Arcade systemNeo-Geo (553 Mbit cartridge)
SoundYamaha YM2610
DisplayRaster, 304 x 224 pixels (Horizontal), 4096 colors

Metal Slug 4 (メタルスラッグ4) is a run and gun video game for the Neo-Geo console/arcade platform created by Mega Enterprise along with Noise Factory. It was released in 2002 for the Neo-Geo MVS arcade platform, and is the fourth game in the Metal Slug series. Two years later, Playmore published Metal Slug 4. This was also the only Metal Slug game that was produced during SNK's bankruptcy, until its sequel released after SNK was "resurrected" as SNK Playmore. It was developed via reverse engineering the Neo Geo cartridge of Metal Slug X.

Metal Slug 4 retains the same game-play as previous titles, with the addition of some new enemies, bosses, weapons, several new vehicles and a new bonus combo system. It was later ported to Microsoft Xbox (not compatible with Xbox 360) and Sony PlayStation 2 as a stand-alone game in Japan and Europe, and along with Metal Slug 5 as a compilation in North America and South Korea. Nintendo Switch version was released in 2018.[1][2]


A bonus scoring system was added that allows the player to be rewarded depending on how many enemies are killed in the time allotted. The time allotted is determined from the type of emblem that is picked up. A time meter will appear on the top of the screen, and if the player lives through the end of the level, they will be awarded bonus points for badges that represent feats accomplished. Eri and Tarma were replaced with Nadia and Trevor.


One year after the events of Metal Slug 3 (timeline wise, also after Metal Slug 6, which takes place after 3) the world is trembling under the new threat of a mysterious but deadly cyber virus that threatens to attack and destroy any nation's military computer system. With Tarma and Eri unable to help due to their own assignments in the matter, Marco Rossi and Fiolina Germi are called in to investigate the situation and are joined by two newcomers, Nadia Cassel and Trevor Spacey. In their investigation, the group discovers that a rich terrorist organization known as the Amadeus Syndicate is behind the nefarious plot and has allied with General Morden's Rebel Army. They head into battle against Amadeus' forces, hoping to destroy the cyber virus before it gets the chance to wipe out the entire world's military computer system.

Halfway through the game's story mode, the player is confronted by who they presume to be General Morden, however in the final stage they find an underground facility where android doubles of Morden are being manufactured. Allen O' Neil (who has appeared numerous times throughout the series) fights the player in this stage for the very last time, and is also revealed to be a machine replica. Finally, the player confronts the leader of the syndicate, Dr. Amadeus himself, who attacks with a series of powerful robots, but he is defeated and is trapped in his own devices as the base self-destructs, presumably killing him. If the player safely escapes the base's bonus explosion stage, the credits will show the main cast eating a feast of food, but if the player gets caught in the explosion, the player character(s) will appear in the hospital, bandaged and bed-ridden, being brought get-well gifts of food from Eri Kasamoto and Tarma Roving. After the credits, a single computer monitor is seen transmitting data to an unknown location before shutting down.

New features[edit]

  • Double Heavy Machine Guns [2H]: The stronger version of the Heavy Machine Gun [H] in the previous series. Allow players to carry two submachine guns which causes 1 damage per shot and fires more rapidly than the Heavy Machine Gun. However, the 2Hs are very rare in the game and have only 200 shots like the Heavy Machine Gun and can only fire in four directions.
  • Monkey Transformation: In the underground path of stage 1 and the final stage, there are scientists with rifles. These aren't loaded with bullets but a special chemical shot, that transforms characters into gibbons which are like the monkey Utan in Metal Slug 3. Although this transformation is new, the sprites used for it are not, they are recycled from Metal Slug 3. Players gain a much stronger jumping ability and the ability to hang on the bars over their heads, which saves them from most of the attacks from the enemy, although they are unable to shoot upward while on the bars (they can still shoot in horizontal directions and directly downwards). But they can only fire a small gun which is similar to the Heavy Machine Gun, walk very slowly, and takes longer to throw grenades. Players can be transformed back into human form by picking up an antidote dropped by scientists. This transformation is the only one in the series with an animation for returning to human form, in which the player falls asleep as a monkey then promptly wakes up as a human. Players who are hit by the chemical shot while in the monkey form will die.

New Slugs[edit]

  • Bradley: First appeared in Metal Slug 2 as an enemy rocket shooting vehicle, it is equipped with powerful rocket shots and a vulcan cannon like the slugs, players can use it after killing the enemy soldier inside it. However, this vehicle has a very short jumping range and crouches much slower than the other vehicles, and will not become temporarily invincible after receiving an attack from the enemy.
  • Metal Claw: First appeared in Metal Slug as the "Melty Honey" under the control of the Rebel soldiers. It will appear with Bradley in stage 2 on a two-player game. It is equipped with a blade-covered shield that shreds enemies, and also enables it to take five shots before it is destroyed. Also in stage 5.
  • Crawler: A mechanical version of the sub-human mutants from Metal Slug 2/X which appears in stage 4. Much like the Camel Slug in the previous two games, it provides no protection to the player, but has a slightly better jumping ability and also does not harm the player if it touches a rolling bomb.
  • Forklift Truck: Appears in stage 5 along with the Metal Claw. Like the Drill Slug from Metal Slug 3, it can "jack up" if the player presses the jump button while onboard the Forklift Truck. It will stab the enemy with the fork at the front if the player presses the bomb button. Its fork can shred enemies too. The Forklift Truck does not have a vulcan cannon; rather, the player uses whatever weapon they have. The player is always exposed to enemy attacks.


Metal Slug 4 was mixed to positive received by players with users scores of 7.8 for PS2, 7.3 for Xbox, 8.1 for Neo Geo and 8.3 for the arcade versions. While Metacritic and Gamrankings are given with 70.47% and 70 alongside with Metal Slug 5 as compilation for both PS2 and Xbox score.[3][4][5][6][7][8][9][10][11]


  1. ^ "Metal Slug 4 returns today, so grab your Hevveee Machine-gun". Retrieved 14 Aug 2018.
  2. ^ "Hamster's Neo Geo Hot Streak On The Switch eShop Continues With Six New Confirmed Games". Retrieved 14 Aug 2018.
  3. ^ "Metal Slug 4 & 5 Review". GameSpot. Retrieved 2013-11-05.
  4. ^ "Metal Slug 4 & 5 - IGN". Retrieved 2013-11-05.
  5. ^ "Review: Metal Slug 4". 2005-11-21. Retrieved 2013-11-05.
  6. ^ "Metal Slug 4 & 5 for PlayStation 2 Reviews". Metacritic. Retrieved 2013-11-05.
  7. ^ Price, James (2005-12-07). "Metal Slug 4 Review • Reviews • PlayStation 2 •". Retrieved 2013-11-05.
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