Swords and Sandals 2 is a game released in 2007 that is focused on turn-based gladiatorial combat. You take part in tournaments and duels, so you can become the champion of the arena and defeat Emperor Antares. I have personally beat this game once. This is a flash game, but you can play it here
Swords and Sandals 2 Full version
Swords and Sandals 2 Full version