Thexder 2, also known as Fire Hawk and Fire Hawk: Thexder – The Second Contact, was released in 1989 on MSX2 and 1990 on DOS. It retained the same concept as the original Thexder but added many improvements. The Fire Hawk robot had the same design as the Thexder: the main laser, shield, and ability to transform into a jet. It also had upgrades to allow it to launch guided missiles, and use special weapons found throughout the game. Obtaining special weapons caused a weapon carrier droid to be deployed, and if positioned correctly, would act as a shield against enemies. Graphics were improved from the original game, and gameplay was divided into sub-levels, with the fourth sub-level containing a "boss" enemy. It was also possible to restart later games at the beginning of a level previously visited.

Thexder 95 (also called Thexder for Windows 95) is a Windows 95 remake of the original Thexder game, which was built with Microsoft's Game SDK (precursor of DirectX). In this game, Thexder can become a tank and jet, and has a large number of new weapons, from grenades to thermal bombs. The game runs in multiple windows: the main view, and several smaller windows each having a different function, e.g., ammo count, map, and actual game, that the gamer could open, close, and resize at will during play.^[8] It was also one of Sierra's showcase games at the launch of Windows 95.^{[citation needed]}

Thexder & Fire Hawk is a compilation that includes the MSX versions of Thexder and Thexder 2. The compilation was designed by Hibiki Godai and Satoshi Uesaka, and was released in 2005 for the PC–8801.

Thexder Neo is a complete rework of the original PC game from 1985, released by Square Enix.^[10] In early 2009, Square Enix sent an application to the ESRB to receive a rating for a game titled "Thexder Neo".^[11] Later that year, the game's existence was confirmed by Square Enix at the Tokyo Game Show.^[12] It was released worldwide on the PlayStation Network on October 1, 2009 as a download for the PlayStation Portable and on January 28, 2010 for the PlayStation 3.^[9]