RETRO ARCADEINSERT NOSTALGIA
● NOW IN THE ARCADE / SHOOTER

Metal Slug Online

Play Iron Relay free in your browser. It is Retro Arcade's original retro-style take on the core Metal Slug gameplay format.

RETRO ARCADE / NOW PLAYING
GAME 024 IRON RELAY
HP ◆◆◆◆◆◆PYLONS 2TIME 106sGRENADES 4SCORE 0
RETRO ARCADE / 024IRON RELAY

Push through 20 industrial assaults. Destroy every signal pylon, then reach extraction. Shoot barricades, dodge hazards, throw grenades, and board temporary armored rigs.

MOVE A/D • JUMP W • FIRE SPACE • GRENADE G • BOARD E
FOUNDRY / SPARK GATE0/20
Break two signal pylons and extract.
WIDE DESKTOP Use A/D or Left/Right to move, W or Up to jump, Space or J to fire, G to throw a grenade, and E to board an armored rig.PORTRAIT PHONE Use the on-screen Left, Right, Jump, Fire, Grenade, and Rig buttons below the stage.
DESKTOP Use A/D or Left/Right to move, W or Up to jump, Space or J to fire, G to throw a grenade, and E to board an armored rig.MOBILE Use the on-screen Left, Right, Jump, Fire, Grenade, and Rig buttons below the stage.
01 / ABOUT THE GAME

Metal Slug Online: Meet Iron Relay

Iron Relay is Retro Arcade's original industrial action campaign. Its 20 stages vary patrols, destructible props, hazards, and temporary vehicle sections.

Move through each district, clear its objective, and reach extraction. Stage progress stays with you while this game page remains open.

Iron Relay is independently created with original art, code, and stages. It is not affiliated with or endorsed by the owners of Metal Slug.

02 / FIELD MANUAL

How to Play

  1. 01Start the first of 20 original industrial stages across four districts.
  2. 02Fight past guards and mines. Shoot barricades, tanks, and every signal pylon on the route before the stage timer expires.
  3. 03Throw a limited grenade to break clustered targets. Board a temporary armored rig when one is available, then reach extraction after all pylons are destroyed.
  4. 04Retry the current stage after a loss. Completed stages remain cleared in this page session; finishing the campaign opens stage replay.
03 / CONTROLS

Your Controls

Desktop

Use A/D or Left/Right to move, W or Up to jump, Space or J to fire, G to throw a grenade, and E to board an armored rig.

Mobile

Use the on-screen Left, Right, Jump, Fire, Grenade, and Rig buttons below the stage.

04 / THE ARCADE WAY

Why Play on Retro Arcade?

01Instant browser play
02No download needed
03Desktop + mobile
04Retro arcade energy
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GOOD TO KNOW

FAQ

How do I complete a stage?

Destroy every signal pylon, then reach the extraction point before the timer expires.

Are there vehicles?

Some stages let you use a temporary armored rig.

How many stages are there?

There are 20 original stages. Earlier clears remain in this page session if you retry.

Is this the official Metal Slug game?

No. Iron Relay is an independent action game with original art and stages.