Alex Kidd[a] is a platform video game series developed by Sega.

The first game in the series, Alex Kidd in Miracle World, was released in 1986 and built into later versions of the Master System and the Master System II model, replacing the Snail Maze/Safari Hunt/Hang-On games of the first model.

After the release of Alex Kidd in Shinobi World in 1990, Sega decided to shift focus towards Sonic the Hedgehog.

In 2020, Sega confirmed that they would be publishing a remake of Alex Kidd in Miracle World developed by Merge Games and Jankenteam.

[3] This ended up being Alex Kidd in Miracle World DX, released on June 22, 2021.