SOH Tactics GX is a strategy RPG game by SOH Digital Entertainments for the Amstrad GX4000. The game can be downloaded and played via a C4CPC cartridge.
The game is a turn-based strategy RPG, inspired Final Fantasy Tactics Advance. You can either play alone, or two player co-op.
A video about how to play the game is below:
You can download the game from here.