GURPS Boardgame Aspects

[Anaraxes]

GURPS is clearly derived from Melee/Wizard/TFT. It's been a long three decades and four editions of GURPS, but you'll see some things that look familiar.

Many people play "arena" games, using the tactical combat rules to try out different tactics.

You might be particularly interested in Martial Arts -- which is actually the advanced combat systems details book, not D&D kung fu monks. Also, GURPS Martial Arts: Gladiators.