Free Online Multiplayer Games Where You Play as Non-Humans: Animals, Fantasy, Mechs, Creative

Animals

• Animal Jam – Explore as customizable animals.
• Star Stable Online – Horse riding/care (free trial, then sub).
• Brawlhalla – Fighting game with animal legends (cat, bear, bird).
• Team Fortress 2 – Classes like Heavy (bear), Demoman (cyclops).

Fantasy Creatures

• League of Legends / Dota 2 / Smite – Dragons, demons, gods, monsters.
• World of Warcraft – Orcs, Tauren, Trolls, Goblins, etc. (sub required).

Robots / Mechs

• War Robots – Mech PvP.
• MechWarrior Online – Sim mech combat.
• Star Wars: The Old Republic – Cyborgs, droids, aliens (F2P).

Creative Platforms

• Minecraft – Custom skins/models (Java/Bedrock).
• Roblox – Infinite user-made games as any creature.

Search "free multiplayer [animal/fantasy/mech] game" for more.