Muxxu is a French gaming portal that runs many, many games by Motion Twin. This one is essentially a port of My Brute to the Muxxu platform. It has an expanded set of skills, rebalanced stats, an enhanced tournament structure, a meaningful ranking structure, and a mechanism whereby you can choose your skills, weapons, stats, and pets to some degree. This last bit makes it impossible to "preview" a brute, thus far no one has developed an exploit to preview even a single level.
Buying and selling of accounts is outlawed and it is enforced. It also has no pupils, replacing them with "jetons" which are tokens you have to purchase from Muxxu in order to gain extra fights. This effectively eliminates cheating (there are a few minor exploits) and monetizes the game. While it's not necessary to pay to play, there are various encouragements that lead just about every serious player to pay at least a little bit.