Three Karatekas are fighting on the same screen (and the same backdrop), in order to proceed in gaining belts. After gaining some points there are frequently two bonus games where you must either kick bombs away (before they explode) or you can deflect fireballs holding a shield. A second player can join the game as well and the third can be controlled by the CPU. The first of the three players to score six points is the winner, and is awarded extra points for every second left. The player with the lowest score at the end of the round is out of the game.
One of the most impressive aspects of this game is that, punches and kicks are fast and furious, I mean really fast! There are twelve attacking moves and a handful of defensive procedures at your disposal here. All of the original International Karate title are offered here, plus a lot more, such as reverse face kick, double head kick (for hitting both fighters) end so on. IK+ was one of the best and more fun to play karate games during the 16bits home computers era. Win points, get the highest belt and be the new master.
IK+ is everything a fighting game should be. It is vicious, spectacular, loud and great looking!
The Atari ST version offers the same quality in details as the Amiga version, although the number of colors here is being reduced (up to 40) and the main difference between them is found in the sunset. The character animation is fluid and impressive. The background image is a wonderful sunset near a temple, and although it does not change, sun's ripples reflect in the sea as it laps the shore!
Much like the Amiga version, the Atari ST version features digitized sound FX of punches and kicks taken from karate/fighting movies and cries that remind us of Bruce Lee. The music is awesome, composed by Rob Hubbard, and was just a conversion from the 8bits Amstrad computer, with 3-channel chip sound.