This is about Blood & steel. A combat supplement from Mayfair Games, Role aids 1993. Its still available on Ebay for $10 to $20.
it comes in a sturdy cardboard box with a combat card deck, a guidebook/rulebook 58 pages, and a GM screen.
It has various rules for weapon specialization, fighting styles, maneuvers, and critical charts. Even a few classes! Barbarian, Duelist, Martial artist, Warlock, Archer.
Here is how the cards work.
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I like the cards. Each player chooses a card, as do the opponents. The card is face down. Then in combat they are shown, you check where the skull is on the card and use the mod that it is across from on your opponents card, along with any other mods for the maneuver. Some maneuvers are faster (initiative bonus/penalty), cause more damage, higher chance for a critical, or harder to pull off (hit penalty).
Its best with not too many players/opponents and not with multiple attacks. I have used it a bit before and find it fun.