Mac OS X Softwares to Massive Multiplayer

TrueCombat: Elite & CQB is a free and open-source tactical first-person shooter mod for the game Enemy Territory, emphasizing realistic combat simulation and intense team-based gameplay in modern-day scenarios.

Active Worlds is a pioneering online virtual world platform allowing users to explore, build, and interact in a 3D environment. It offers a vast universe of user-created worlds, combining elements of social networking, gaming, and 3D modeling.

Roblox is a global platform uniting people through play. It is powered by users, offering an ever-expanding universe of immersive experiences created by a community of millions of developers and players.

SuperTuxKart is a vibrant and engaging open-source kart racing game featuring a diverse cast of mascots from the open-source world. Offering various game modes, split-screen multiplayer, and cross-platform compatibility, it provides accessible and fun racing action for players of all ages without any cost.

Call of Duty is a long-running, highly successful first-person shooter video game franchise known for its intense multiplayer action, cinematic single-player campaigns, and diverse settings ranging from historical conflicts to futuristic warfare.

Battlefield is a long-running series of first-person shooter video games renowned for its large-scale multiplayer battles across various historical and futuristic settings. With a strong emphasis on team-based gameplay and vehicular combat, it offers a dynamic and immersive war experience.