Top Alternatives to Tremulous

Counter-Strike is a globally recognized series of multiplayer first-person shooter games. Players engage in strategic team-based combat, with either terrorist or counter-terrorist objectives like bomb defusal or hostage rescue. Known for its competitive esports scene and precise gameplay.

Quake is a landmark series of fast-paced, first-person shooter video games known for its pioneering 3D graphics, intense multiplayer deathmatch, and distinctive dark sci-fi/fantasy blend. It emphasizes speed, skill, and movement.

Xonotic is a fast-paced, arena-style first-person shooter with a focus on pure competitive gameplay. It is free, open-source, and offers both single-player and robust multiplayer modes with a variety of weapons and game types.

Doom is a pioneering first-person shooter franchise renowned for its fast-paced combat, visceral action, and iconic blend of science fiction and horror themes, pitting a lone marine against hordes of demonic invaders.

Cube 2: Sauerbraten is a fast-paced, Quake-inspired open-source first-person shooter with a unique in-game map editor and strong multiplayer focus. It emphasizes quick movement and tactical team-based gameplay.

OpenArena is a free and open-source standalone 3D first-person shooter game. It is a community-developed clone of Quake III Arena, offering fast-paced multiplayer and single-player combat with a variety of weapons and game modes.

Nexuiz Classic is a fast-paced, free and open-source arena first-person shooter that delivers intense multiplayer combat with a focus on classic deathmatch gameplay and a wide array of futuristic weaponry.

Red Eclipse is a fast-paced, free and open-source arena first-person shooter built on the Cube Engine 2. It emphasizes parkour-style movement and mutiplayer action across various game modes, offering a refreshing take on the genre with a sci-fi aesthetic.

Urban Terror is a free-to-play, multiplayer first-person shooter that balances realism with fast-paced action. Built on a modified ioquake3 engine, it offers a competitive experience with diverse maps, weapons, and gameplay modes.

AssaultCube is a free, fast-paced, first-person shooter game built on the Cube engine. It offers both online multiplayer and single-player modes, emphasizing tactical gameplay and high performance on various hardware.

Warsow is a fast-paced, open-source arena first-person shooter designed for competitive play. It emphasizes movement, aiming, and strategic gameplay in futuristic environments.

Dead Space is a critically acclaimed survival horror video game series known for its intense atmosphere, grotesque creature design, and visceral combat. Players take on the role of Isaac Clarke, an engineer struggling to survive a horrific outbreak on a deep-space mining vessel.

Unvanquished is a fast-paced, open-source, science fiction themed first-person strategy shooter. Players can choose to fight as technologically advanced humans or adaptable alien lifeforms, engaging in intense multiplayer battles where both strategic base building and skilled combat are essential for victory.

Alien Arena is a fast-paced, free-to-play deathmatch style first-person shooter set in a futuristic, science-fiction universe. It emphasizes classic arena combat with a variety of weapons, maps, and game modes, offering both online multiplayer and single-player bot matches for intense action.

AU Modern FPS is a free-to-play, browser-based first-person shooter game developed with Unity3D, offering fast-paced multiplayer action directly in your web browser.