Released in 1982, Donkey Kong Junior is a classic arcade platformer where you play as Donkey Kong Jr. on a rescue mission. The core gameplay involves ascending through four distinct levels—Vines, Springboard, Chains, and Mario's Hideout—to collect keys and free your captured father from Mario. Players must master vertical traversal using dynamic elements like swinging on vines and utilizing springboards to navigate the antagonist's obstacles.
The primary gameplay loop centers on ascending through four distinct, vertically oriented environments, each presenting unique traversal challenges. Players must interact with various environmental elements to progress upward toward the objective of freeing the captive ape.
The central mechanic involves climbing and maneuvering across different types of vertical pathways. These include vines, which demand precise timing for safe passage, and springboards, which are used to launch the player across gaps or up to higher ledges. Later stages introduce chains, adding another layer of dynamic movement complexity to the ascent.
The narrative establishes a clear revenge scenario. Following the events of the preceding title, the human character, now established as the captor, has locked the large ape away. The atmosphere is one of urgency, as the young protagonist must overcome obstacles specifically designed by the antagonist to prevent the rescue.
The game is structured across four primary, increasingly difficult levels, each designed to test the player's mastery of the movement mechanics:
As a main game originally launched in the arcade format, this title currently has no officially released downloadable content (DLC) or expansions. Furthermore, there are no official remakes or remasters associated with this specific original release version.
This title was initially released exclusively for the Arcade platform.

A Commodore 64 port of Donkey Kong Junior, confirmed by magazine ads, but never released.

An Apple II of Donkey Kong Junior, confirmed by magazine ads, but never released.

An IBM PC port of Donkey Kong Junior, confirmed by magazine ads, but never released.

A cancelled Coleco Tabletop port of the arcade game Donkey Kong Junior. After announcing, Coleco decide to port the Game & Watch version of the game instead.

In the early 2000s, incomplete prototype versions of Donkey Kong and Donkey Kong Jr. for ColecoVision were discovered. Both cartridges actually postdated the ColecoVision releases and were seemingly ports of the versions from the Coleco Adam computer, which featured more levels and cutscenes. The games were re-compiled into hacked ROMs titled "Super DK!" and "Super DK Junior" respectively; the unaltered ROMs were never released.

This is the BBC Micro port of the homonymous arcade game. It was finished, but never released.

This is the Coleco Adam port of the homonymous arcade game.

Donkey Kong Jr. is an action game released by Nintendo in 1982. Donkey Kong has been captured and caged in his latest encounter with Mario. Donkey Kong Jr. is on his way to set him free! Skillfully jump and hang on to vines, avoid the enemies, get to the top, and steal the cage's key from Mario.

This is the Atari 7800 port of the homonymous arcade game.

This is the port for Atari home computers (8-bit family) of the arcade game Donkey Kong Junior.

This is the Atari 2600 port of the homonymous arcade game.

This is the Intellivision port of the homonymous arcade game

This is the ColecoVision port of the homonymous arcade game

Donkey Kong Jr. for the Nintendo Entertainment System is one of the most recognizable ports of the original arcade game, being re-released and ported many times.

The first Game & Watch version of Donkey Kong Jr. is the first game in the New Wide Screen series. It is a single-screen single-player game.