Arena of Octos

Arena of Octos is a single-player, turn-based combat video game for the Apple II and TRS-80 computer families. It was created by Steve Kropinak and Alan "Al" Johnston in 1981 and published by SoftSide magazine. Having worked out the premise of the game together, Johnston wrote the TRS-80 version and Kropinak the Apple II version. SoftSide paid Johnston and Kropinak $90 each for first publishing rights of the game's BASIC listing, and a further $90 to acquire the full rights to the programs.

In the game, you assume the role of a human space pilot, captured by an aggressive race of green-skinned aliens known as Octons after straying into their area of space. To win your freedom, you must become a gladiator and engage in physical combat with increasing numbers of Octon warriors. The computer controls the Octon warriors.

Source: Wikipedia, "[en.wikipedia.org/wiki/Arena_of_Octos Arena of Octos]", available under the CC-BY-SA License.