Item description:

Fire Emblem: Order of the Crimson Arm is a hack which follows the trials
and tribulations of Algimas, an up and coming mercenary leader,
and a foreign tactician testing their knowledge of warfare on the battlefield.
The two set out together to the continent of Fadrel for fame and fortune.
Over the course of time, both will go through various events which will decide
not only their future, but the fate of many others as well.

This is the final incarnation of a long-running Fire Emblem hack, formerly known as TactHack. As the name implied, the game features a playable tactician, or “avatar” character, in the vein of Robin from Fire Emblem Awakening. General gameplay is similar to vanilla Blazing Sword, with little in the way of large mechanics changes.

See the Serenes Forest thread for further information, including how to replace the tactician’s portrait with whatever the player wants it to be.