Alex Kidd: The Lost Stars (アレックスキッド ザ・ロストスターズ Arekkusu Kiddo za Rosuto Sutāzu) is a platform arcade game released by Sega in 1986. It was ported to the Sega Master System in 1988. It is also released on the Wii Virtual Console in North America on March 9, 2009 and in the PAL regions on April 17, 2009.
Alex Kidd: The Lost Stars features Alex Kidd and Stella searching for the twelve Zodiac signs, which disappeared from the sky. A priest named Daleda (ダレダ) informed Alex that to return the stars, he must find twelve Miracle Balls, two of them being in six different worlds.
By default, the player can only run and jump, and must avoid obstacles to take the Miracle Ball in the end of the stage before time runs out. In the stages there are items that allow the character to temporarily shot, enhances running speed, improved jump, and extra time.
The arcade and Master System versions are similar, aside from graphics and sound. The arcade version has a limited number of lives (three by default), whereas the Master System version has infinite lives, though being hit or falling into a pit subtracts seconds in the timer and backtracks the player to the last checkpoint in the round. The arcade version features a cooperative two player mode, with the second player assuming the control of a female counterpart to Alex Kidd named Stella.