Metal Slug 4 and 5 Easter Eggs
PS2 | Submitted by ChedderheadInternal Level on Metal Slug 5
I stumbled upon this on accident. In stage 3 of Metal Slug 5 there is a pipe where a man hides and throws bombs. Jump off the truck onto the platform and kill the man. Jump into the pipe and move right. There is a different level in the pipe.
Metal Slug 4 and 5 Cheats
PS2 | Submitted by LucasTurn into a monkey
On the last level. If you kill the scientists with guns, they will sometimes drop red potions. If you pick these up you will turn into a monkey. When you are a monkey you can hang on bars and hold your gun in your feet. To change back, you have to find a blue potion or die.(This only works on Metal Slug 4).
PS2 | Submitted by James LewisCrouching Helps
The game's not that hard most of the time just crouch! It helps a lot, espically when you fight the bosses.
PS2 | Submitted by Andy HuynhAlternate ending in metal slug 4
After you defeat the last boss, you go to a room where you must run from explosions. Instead of running from it, just let your character get killed in an explosion. Then you will see a different ending.