This PC-only ship-based fantasy combat game isn’t non-violent exactly, but it’s just sailing ships shooting at each other, so it isn’t as personal and visceral as people mowing other people down face-to-face.
In Maelstrom, up to 16 players take to the seas and fire volleys of cannonballs at each other, battle vicious sea monsters, and collect loot until only one schooner remains. It’s a fairly involved game, so it’s not good for smaller kids, but if you’re looking for a unique take on the “one vs. many” genre, and you dream of being a buccaneer on the briny deep, this is the game for you.