Growl, known in Japan as Runark (ルナーク, Runāku), is a belt-scrolling beat-'em-up originally released for the arcades by Taito in 1990. Set in the early 20th century, the player controls a forest ranger who must protect the local wildlife from a group of evil poachers who are driving the animals to extinction. A home version was released for the Sega Genesis (Mega Drive) on November 1991. It was also included in the arcade game compilation Taito Legends 2 for the PlayStation 2, Xbox and Microsoft Windows.

The player begins the game by choosing from one of four different forest rangers, each with a different amount of health, attack strength, and jumping height. There are four variations of the game (which can be determined by dipswitch settings):

• A common two player setting (used in most 2 player cabinets).
• A four player setting with individual coin slots for each player (usually seen in most conversions of 4-player cabinets such as Crime Fighters, Gauntlet, and Quartet).
• A four player setting which uses a pair of two player cabinets linked together with a special cable.
• A four player setting which uses two coin slots for everyone (usually seen in conversions of Trog among other four player cabinets which use two coin slots).

The two-player variant allows the player to choose which character they would like to play as while the four-player versions assign each character to a player slot like other beat em ups.

The game's controls consists of an eight-way joystick for moving the character and two action buttons (attack and jump). The player can perform a variety of different attacks (punches, kicks, and finishing blows) depending on the position of an enemy. By pressing both buttons while surrounded by enemies, the player can perform a special attack that strikes every enemy around him. By pressing both buttons while holding the joystick upwards, the player will perform a longer jump.

The player can procure weapons by destroying barrels and wooden crates or disarming certain enemies. There are a total of eight weapons which can be obtained: three melee weapons (a pipe, a sword and a whip), two throwing weapons (knives and hand grenades), and three firearms (a pistol, a machine gun, and a rocket launcher). The barrels and crates can also be picked up and thrown at enemies as well. When the machine gun or rocket launcher runs out of ammunition, these are still wielded by the player as melee weapons. The pistol, on the other hand, is thrown by the player after all of its bullets are used. The player can drop his current weapon by pressing down and attack while wielding it. If a weapon lies on the ground after a certain period, it will vanish completely.

There are seven regular stages (called rounds) and a bonus game, for a total of eight stages. The locations include a city, a moving train, a boat, a jungle, a cavern, and the hideout of the poachers. There are six types of enemy characters throughout the game, excluding the final boss (who has two forms). There are also animal helpers that will help out the player after they're rescued from a poacher, such as an eagle, a herd of deer, and an elephant.