Metal Slug 4 Storyline: In the year 20XX, a cyber-terrorist group has struck out at the world by unleashing a computer virus through the internet with a sole purpose of hijacking the militaries of the world's nations. Join Marco, Fio, and new Metal Slug team members Trevor and Nadia to stop the distribution of the virus before it's too late.
Metal Slug 5 Storyline: A research installation developing the next-generation of Metal Slugs is attached by unknown forces and a disc containing Metal Slug secrets has been stolen. Lead Marco, Tarma, Eri and Fio into "The Corridor of Fire" to recover the secrets and destroy the paramilitary syndicate known as the Ptolemaic Army.
Metal Slug 4 features:
- Take the battle to the air, sea and land as you once again battle Morden's forces
- Six challenging stages and a wide array of unique enemies
- Famous non-stop, fast paced MEATL SLUG action
- Play as returning favorite characters Marco and Fio or brand new characters Trevor and Nadia
- Extensive power-ups of over-the-top weaponry, health and ammo
- Fight off huge boss characters on each level and battle massive end bosses
Metal Slug 5 features:
- Five massive stages and all new enemies
- Take up arms against this ultimate weapon of destruction "The Doomsday Machine" that fuses the mysterious power of ancient ruins with that of Metal Slug science
- Wage an assault on the enemy's underwater stronghold.
- Find a factory producing robotic weapons developed from the Government Army's data for next-generation Metal Slugs.