Munera Sine Missione, Exagoni Libero is a set of free wargames rules for gladiator combat. It is based Munera Sine Missione, but unlike that set doesn’t use a hex mat.
gladiator
Familia Gladiatoria Gladiator Rules
Familia Gladiatoria is a set of free wargames rules for gladiator campaigns.
Glory In The Arena Gladiator Rules
Glory In The Arena is a set of rules for playing gladiatorial combat with 54mm figures.
Habet, Hoc Habet! Gladiator Rules
For a limited time, the Habet, Hoc Habet! Rules from Scale Creep Miniatures is available on a pay-what-you-want basis. These are designed for fast combat among Roman Gladiators, including campaign and gambling rules.