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Toptagged Multiplayer and Open Source (141 results)

Explore games tagged Multiplayer and Open Source on itch.io · Upload your games to itch.io to have them show up here.

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The automation tower defense game
AnukeVerified Account
1 – 100
Strategy
Empires Ascendant is a free, open-source, historical Real Time Strategy (RTS) game by Wildfire Games.
Strategy
Recreates the classic Command & Conquer titles with a Free/Libre engine.
1 – 63
Strategy
Play tabletop games in a physics-based 3D environment with your friends!
1 – 10
Simulation
Rebirth of a classic mod
1 – 8
Strategy
Play in browser
90s era golf, with network play
1 – 8
Sports
Command the forces of The Project in a battle to rebuild the world.
1 – 10
Strategy
A community-produced deathmatch FPS
1 – 16
Shooter
Turn-based competitive tactics!
1 – 2
Strategy
Strategy game with simultaneous turns where nature is a finite resource
Strategy
Source of Mana is a work-in-progress open-source 2D MMORPG made with Godot, pixelart graphics and an hand-crafted world.
1 – 32
Adventure
Play in browser
Experimental social game. Leave messages for other players in a dead world.
Interactive Fiction
Play in browser
Establish your tribe and fight in single player or multiplayer for control of the islands!
1 – 6
Strategy
A source port of Serious Sam Classic: The Second Encounter and a complete overhaul of Serious Engine 1.10.
1 – 16
Shooter
A modern and polished version of OpenArena
1 – 16
Shooter
A game about shooting everything, anime girls, and insane movement. Welcome to the future.
1 – 32
Shooter
D-Day: Normandy is a team-based game where Allies battle against the enemy Axis on different maps set across the world.
1 – 16
Action
Master Multiplayer with Photon Quantum: Deterministic, Predictive, and Lag-Free.
1 – 16
Platformer
Play in browser
Aliens Vs Humans Asymmetric Team-Based
1 – 32
Shooter
A farming game that's fun for 30 seconds or 30 minutes at a time!
Simulation
Play in browser
Simple chess game with simple AI
1 – 2
Puzzle
Play in browser
The Ultimate Version of Quake 3 Clone
1 – 24
Shooter
Challenge your friend to an intense duel, or gather two clans to fight a spectacular war. Forever free and open-source.
1 – 20
Shooter
Play in browser
Community driven open source multiplayer shooter
1 – 10
Shooter
Cats, Asteroids, and Orbital Mechanics
1 – 4
Action
Play in browser
Don't drown!
1 – 4
Survival
Play in browser
open-source 3d multiplayer prototype built using Gdevelop and THNK Framework
1 – 255
Play in browser
FLIGHTGEAR FLIGHT SIMULATOR sophisticated, professional, open-source
Simulation
Win a war by saving lives
1 – 2
Action
A strategy game where the objective is to out-score your opponent by getting your Squibbles through a vertical maze.
1 – 2
Strategy
Play in browser
A cooperative fast-paced game about running a restaurant together.
1 – 10
Simulation
High-fidelity web OS hacking simulator. Script, explore apps & terminals in a living sandboxed system.
Simulation
GeoGuess is an open-source geography game with Google Map StreetView.
Educational
Collaborative multiplayer digital art, analogue r/Place
Play in browser
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