Play Metal Slug 4 online
2 players online · co-op · everyone on their own device How online multiplayer works
New recruits, same glorious chaos of bullets, explosions and walking tanks.
Play nowFree, right in your browser, nothing to install.

- Year
- 2002
- Manufacturer
- Mega Enterprise / Noise Factory
- Players
- 2 players at once
- Genres
- Action, Platformers
- Decade
- 2000s arcade games
On UsuArcade, Metal Slug 4 plays as online two-player co-op: you on your phone or PC, your friend on theirs, in the same game and in real time. Metal Slug 4 hit in 2002, when the series was already a legend in arcades and on every Neo Geo cabinet tucked into the back of a pizza place. It keeps everything that makes the series great: gorgeous hand-drawn sprites, goofy humor and two-player run-and-gun mayhem where the whole screen keeps blowing up.
History
It was the first entry made outside the original team, developed by Korea's Mega Enterprise and Noise Factory during a rough stretch for SNK, which gives it a flavor all its own.
This one introduces two new soldiers, Trevor Spacey and Nadia Cassel, fighting alongside veterans Marco and Fio. The bad guys are the Amadeus Syndicate, a terrorist outfit plotting a worldwide cyberattack. Longtime fans point out it reuses a lot of enemies and art from earlier games, but it's still Metal Slug through and through.
How to play
Push right, shooting, jumping and tossing grenades. Rescuing POWs earns you new weapons like the heavy machine gun or the flamethrower, plus bonus points.
Along the way you can hop into the famous Slug vehicles, which soak up some hits and pack their own cannon. When one's about to blow, bail out in time. Every mission ends with a massive boss whose attack patterns you'll need to learn.
Fun facts
- Trevor and Nadia debut here; Tarma and Eri aren't playable in this one.
- It was the first game in the series developed by studios outside the original team.
- The Amadeus Syndicate is the villain of this entry.
In the arcade
Just like the arcade, only from your own couch: sit down at the Metal Slug 4 cabinet, invite your friend once they're in the lobby and push forward together and split the firepower. Nothing to install: it runs in your browser on phone or PC, gamepad supported, and every game starts with INSERT COIN, free.
Anyone else in the lobby can drop in as a spectator and watch live while chatting, and your scores go up on the arcade's high score board.
FAQ
Can I play Metal Slug 4 online with a friend?
Yes. On UsuArcade, Metal Slug 4 is online two-player co-op: each of you plays on your own phone or PC, in the same game and in real time. Sit down at the cabinet, invite your friend from the player panel and push forward together.
What year did Metal Slug 4 come out?
2002, developed by Mega Enterprise and Noise Factory.
Who are the characters in Metal Slug 4?
Returning heroes Marco and Fio, plus newcomers Trevor and Nadia.
How many players is Metal Slug 4?
One or two players at the same time, in co-op.
Do I need to install anything?
No. It's free in your phone or computer browser. Every game starts with INSERT COIN.