Gaming
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Open.gl
An extensive, beginner-friendly guide to modern OpenGL for game development on all major platforms, taking you from a bl…
Open5e
A clean, fast reference for the Dungeons and Dragons 5th Edition open rules, with searchable monsters, spells, and class…
OpenAim
A browser first-person aim trainer with scored drills, ranked mode and detailed feedback on accuracy, letting you practi…
OpenArena Live
Play Quake 3 style arena deathmatch in the browser with friends using WebAssembly and WebRTC, with no download needed. P…
OpenArena Live
A browser version of the OpenArena Quake 3 clone, a free multiplayer first-person shooter you can play with friends with…
OpenCritic
A review aggregator for video games that ranks critics transparently and summarizes scores from hundreds of publications…
OpenFront
A real-time multiplayer strategy game on a world map where you expand your territory and eliminate rival nations until o…
OpenGameArt
A community repository of freely licensed sprites, music, and 3D models that developers can legally use in their own gam…
OpeningTree
A chess tool that builds an opening tree from your Lichess or Chess.com games, grandmaster databases, or custom PGN for…
OpenLara
An open-source remake of the original Tomb Raider engine that runs right in the browser, letting you guide Lara through…
OpenRA
Free, open source rebuilds of the classic real-time strategy games Red Alert, Command & Conquer and Dune 2000, playable…
openScope
A free air traffic control simulator that runs in the browser, where you guide arriving and departing aircraft safely us…
OpenTTD
The home of the free, open source remake of Transport Tycoon Deluxe, where you build road, rail, sea and air networks to…
OpenTTD in the Browser
The open-source transport tycoon game OpenTTD compiled to WebAssembly, so you can build railways, roads and shipping net…
OpenTTD Online
A free browser version of OpenTTD 15.3, the open source transport tycoon sim where you lay rails, run trains and grow a…
Operius
A high-speed arcade shooter inspired by 80s classics, playable in the browser, where you borrow King Midas's crutch and…
Opposite Reaction
A tricky sliding puzzle where every move triggers an equal and opposite reaction, which can mess with how you think abou…
opus
A short Bitsy story about what to do after the world ends: you wander a quiet, empty post-apocalypse and keep yourself b…
Orb Of Creation
A magic-themed incremental about creating everything from nothing. Start with a single orb and build up spells, resource…
Orb Tower
A roguelike bubble puzzler: climb a tower by matching and popping orbs, picking up upgrades that reshape each run as you…
Orb.farm
A tranquil aquatic ecosystem simulator where you sculpt a glass orb, add algae and fish, and watch a tiny nutrient cycle…
Orbital Tactics
Defend Earth by creating orbiting clouds of bullets, using real orbital dynamics to place them where they do the most da…
Orbital Traversal
A relaxing 2D space game where you exploit or battle gravity and orbital physics, steering through a gravitational playg…
Orbiting
A tiny physics game where the goal is to keep a spacecraft orbiting a planet for as long as you can without crashing or…
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