Kerotans are dolls of cartoon frogs that are hidden in various areas in several games. Kerotans are easily recognized by their distinctive croaking sound. The kerotan first appeared in Metal Gear Solid 3: Snake Eater, and has since appeared in Metal Gear Solid: Portable Ops, Metal Gear Solid: Portable Ops Plus and Metal Gear Online.
Metal Gear Solid 3: Snake EaterEdit
In Metal Gear Solid 3, every unique area in the Virtuous Mission and Operation Snake Eater contains one kerotan, except the Groznyj Grad Sewers. Hitting all 64 kerotans gives the player the "Kerotan" ranking and unlocks the stealth camouflage for subsequent playthroughs of the game from a completed save file. Getting all Kerotan frogs in the HD Collection will also unlock a trophy/achievement called "It Ain't Easy Being Green," referring to a catchphrase uttered by the Muppet mascot Kermit the Frog, to whom the Kerotan also bears somewhat of a passing resemblance. Likewise, shooting a Kerotan for the first time in the same version will unlock the achievement/trophy "Prince Charming", referring to the fairy tale The Frog Prince, or its Disney adaptation The Princess and the Frog.
Metal Gear Solid: Portable Ops and Metal Gear OnlineEdit
In Portable Ops and Metal Gear Online, the kerotan is an item central to the "Capture Mission" mode (essentially the same as the "Capture the Flag" mode in many mainstream team-based shooters). In the latter game, the player can also obtain Kerotan-colored Ghillie suits (top and bottom), Gas Masks, and Soft Caps if the player attends the birthday celebration for Kerotan on June 08, 10, and 12 for the two-year anniversary of Metal Gear Online.
Metal Gear Solid: Portable Ops PlusEdit
In the Infinity Mission of Portable Ops Plus, kerotans are hidden objects in various stages. Finding and hitting a kerotan gives the players a bonus item, such as Stealth Camouflage, Fultons, large rations, body armor, or large medical kits.
On the official site for Portable Ops Plus, the user has to locate various Kerotans to access parts of the site, 7 for each map, 14 total. They also lay hidden, requiring the user to either locate them via hearing the Kerotan's croaks, and/or using the Kerotan Locator (which fills up the closer to the Kerotan's location the aiming curser gets). It requires at least one reload before finding all of them, either by pressing the reload button or by clicking on a kerotan. Upon revealing them they also expose parts of the site that detail various features from Portable Ops: "New Maps," "Infinity Mission," "MPO+ Trailer," "Battle Types," "Support for Beginners," "Unique Characters," and "New Characters" on Map A (which resembles the Town); "Boss Rush Mode," "AP Recruiting," "Online Trade," "New Careers," "Character Development," "Communication," and "Special Movie" (a movie detailing a GA-KO race with the Yellow Genome, who was supposed to act as the referee/race starter, winning by crossing the "finish tape" that was a laser sight, causing Roy Campbell and Raiden, under Old Snake's direction, to retaliate by blowing away the Yellow Genome and the GRU soldier with RPG-7 rounds) on Map B (resembling Metal Gear REX). Completing both maps will result in Naked Snake calling the user via Codec and supplying them each time with one of two wallpapers that references Portable Ops Plus.
Metal Gear Solid: Snake Eater 3DEdit
In Metal Gear Solid: Snake Eater 3D, all the Kerotans, as well as the Kerotan rank and Para-Medic discussing the Kerotan in an optional radio call, have been replaced by Yoshi from the Super Mario series.