Great Medieval Battles is a "quadrigame", four thematically connected games that use the same basic rules.
The only problem I can see is that the game tends to be a bit slow due to the excessive number of die rolls.
"[3] In a retrospective review in Issue 85 of Fire & Movement, Peter Pariseau liked the game, calling it "one of the more interesting past efforts.
"[4] In a retrospective review in Issue 6 of Simulacrum, written over 20 years after the publication of Great Medieval Battles, John Kula considered the relatively simple and dated game and commented, "Board wargame systems have tended to become more sophisticated and more complex.
The cloud in this silver lining is the unfortunate feeling that the early games are unsophisticated and somehow beneath our dignity.