Best Free Open World Games for PC and Browser in 2021!

Explore a bright and fantastical anime-styled world in miHoYo's free-to-play online RPG Genshin Impact. Assemble your crew of adventurers and shift between them on the fly, as you journey across the world of Teyvat and fight monsters, solve puzzles, and help the townsfolk.

Take part in an immersive multiplayer online fantasy world in Stein, a charming free-to-play social browser-based MMORPG from pg5-studio. Embark on hundreds of quests and take on challenging wave dungeons -- or just enjoy the social aspects of the game!

Become a devil hunter and challenge the forces of evil in Dark Knight, a free-to-play browser MMOARPG from Fortune Game Ltd. Start off as a sorcerer or slayer and summon a goddess to fight by your side as you ascend to become the ultimate devil-fighting machine!

Embark on an epic quest to save world in League of Angels - Heaven's Fury, the latest entry in the free-to-play browser-based MMORPG franchise. Play as a mighty Dragoon, the enigmatic Mage, or deadly Archer and recruit your team of angels from the sides of light and darkness to fight against demonic beasts and their vile masters in a gorgeously rendered fantasy world.

Clash of Avatars is a free to play browser-based ARPG with simple controls and ease of play that’s virtually unrivaled in the realm of online gaming. It’s light-hearted, casual fun with a bright and cheery anime style that’s evident even when you’re hacking through scores of enemies.

Take part in huge intergalactic battles and take on the whole galaxy in DarkOrbit, the free-to-play browser-based space combat MMO from Bigpoint -- now in 3-D! Choose your faction and your ship, each with their own strengths, and take off into adventure!

Defend the Planet Halpha against the threat of the DOLLS in F2P sci-fi MMORPG Phantasy Star Online 2: New Genesis! PSO2:NG is a remastered version of the original PSO2, with stunning new graphics and gameplay features.

The former Cuisine Royale has a new name, but the free-to-play battle royale action is just as crazy as before! CRSED: F.O.A.D.

Neverwinter is an action MMORPG based on the acclaimed Dungeons and Dragons universe. In Neverwinter you take on the role as a mighty hero who must set out to protect the lands of Neverwinter from those who conspire to see it destroyed.

Become a creature of myth and play and explore a fantastic world in free-to-play social game Fer.al! Customize your creature with numerous body modifications, marking, and even clothing, and build your sanctuary to suit your personal style and go off on adventures with your friends!

Astellia Royal is a free-to-play MMORPG that blends old-school mechanics with new-school sensibilities, all wrapped up in a beautiful package that's sure to please a wide variety of gamers. Choose from one of five classes and embark on an epic quest in both PvE dungeons and three-faction PvP battlegrounds.

RuneScape is one of the most popular free-to-play Browser MMORPG, from the British development studio Jagex. Set in a detailed, medieval fantasy world of epic scale both geographically and historically, RuneScape proudly draws its inspiration from classic role-playing games to deliver a contemporary, innovative and original experience for millions of players across the globe, with a popular subscription option of even greater scale and ambition, both running directly within almost any computer’s browser.

In Closers, a free-to-play fighting MMORPG, horrific creatures are springing from mysterious dimensional gates all around New Seoul, and it's up to you to stop them! Play as one of several psychic warriors, each with their own unique backstory and special abilities, and reclaim Korea!

Fiesta Online is a free to play 3D cartoon style MMORPG with simple gameplay, cell-shaded graphics, regular updates, and now with a browser version. The game combines easy to learn controls with the accustomed depth of an online role-playing game, which makes it suitable for beginners and experienced players alike.

Path of Exile is an 3D Action RPG published by Grinding Gear Games. Similar to games such as Diablo and Torchlight, Path of Exile allows players to explore various dungeons in the forms of story "Acts".

Survive on the edge of civilization in Stay Out, a free-to-play post-apocalyptic MMORPG from Mobile Technologies LLC. Become a "stalker," exploring the vast and hostile Alienation Zone in search of artifacts, but tread carefully -- dangerous creatures lurk in the dark, and you'll need all your wits, and a quick trigger finger, to survive.

Phantasy Star Online 2 is a free to play 3D MMORPG published by SEGA. Based on the original Dreamcast and Gamecube series, Phantasy Star Online 2 offers players the chance to visit detailed worlds and fight hundreds of interesting enemies.

Avast! Set sail and plunder the high seas in Ultimate Pirates, a web-based MMORPG from Gameforge and developer Moonmana.

Grand Fantasia is a free-to-play 3D massively multiplayer online role-playing game (MMORPG) with anime-inspired graphics, that has enjoyed great success in other territories. The game is also called Dreamy Journey Online in other parts of the world.

ArcheAge is a fantasy sandbox MMORPG that sends players on a journey across the great continents of Nuia and Harihara. In search of the legacy of the Delphinad, the greatest city to ever exist, they will unfold the secrets of the Lost Continent as well as whatever adventures and treasures that turn up along the way.

Cabal Online is a free 3d Fantasy MMORPG (Massively multiplayer online role playing game) with fast paced combat system and awesome graphics, that takes place in the world of Nevareth. The game provides quite good options, with features that include a unique combo system, timed and group dungeons, spectacular animations, and massive player versus player nation wars.

Dino Storm is a 3D RPG browser-based MMO by Splitscreen Studios. Players embark on a perilous journey to DinoVille, with nothing more than a change in their pockets, some ammunition, a loaded laser cannon, and your very own dinosaur.

Fight against the God of Destruction in Mu Legend, the free-to-play action RPG follow-up to Webzen's popular Mu Online. The attempt to hide evil in a human body failed, causing death and destruction on a massive scale.

Play Fortnite in a totally new way, in Fortnite: Battle Royale, the free-to-play spinoff of Epic Games' builder/shooter. Like other classic BR games, you'll be dropped into the world and forced to scavenge and survive.

RPG MO is a free-to-play retro-style sandbox MMORPG featuring pixilated graphics and wide, colorful world in which players can level up various combat abilities, or take a break from the hack-and-slash and focus on crafting skills. This 2D open-world MMORPG is available on PC via browser, client and Steam.

Star Trek Online (STO) is a free to play 3D Sci-Fi MMORPG based on the popular Star Trek series. In this massively multiplayer online game from Cryptic Studios, players can pioneer their own destiny as Captain of a Federation starship or they can become a Klingon Warlord and expand the Empire to the far reaches of the galaxy.

AdventureQuest 3D is Artix Entertainment's free-to-play follow-up to AdventureQuest Worlds, offering a fantastic MMORPG experience across multiple platforms. Explore an ever-expanding world, battle dangerous monsters, and capture amazing loot!

Guild Wars 2 represents ArenaNet's attempt to turn MMO convention on its ears and create an engaging game for players of all skill levels and play styles. It does away with typical things like the holy trinity (tank, healer, DPS) and eschews traditional group mechanics for open-world content, which anyone can join in on without hampering other players' efforts.

Eldevin is a free-to-play Browser MMORPG (and client), from Hunted Cow Studios. Set in the Eldevin Kingdom, players must protect their homeland against the Emperor of the Infernal Empire, hell bent on obtaining powerful artifacts which are sure to plunge the kingdom into chaos and confusion.