I’ve compiled a list containing every sci-fi browser based game I was able to find. If you know of any other games that are worthy of this list please contact us or leave a comment at the bottom of this page. Thanks.
Astro Empires is a highly addictive space strategy game, where you play with or against thousands of other real players, in real time, to control the Universe.
You play in a persistent universe, which means that the game keeps running even when you are not online. To play, all you need is a web browser and an internet connection. No downloads or plugins are required.
Enter an online game where you get to create a character, build up your virtual collection and battle against other brawlers. Each Gundalian Invader Bakugan comes with a secret DNA Access code that unleashes your virtual Bakugan. Getting in is easy – all you need to do is create an account. You don’t need a code to join but you will want one if you want to win the battle.
Battle Dawn is a strategy MMO browser based game featuring three types of worlds with thousands of other real players. The game is built entirely in Flash. It’s free to play and requires no downloads.
You begin as the leader of a small colony and through diplomacy, strategy and skill you’ll expand your rule over the entire world.
Which side will you choose – Human or Cylon? The choice is yours with Battlestar Galactica Online: the free-to-play, browser-based MMO by BigPoint. Immerse yourself within the exciting universe of the hit re-imagined series from Syfy. Interact with your favorite key characters, complete challenging missions from your commanding officers, and fly a Colonial Viper or Cylon Raider – or command ships never seen before now. But first, you must decide: will you stand with humanity, or against it?
DarkOrbit is one of the most popular browser based sci-fi RPG games, for fans of space-inspired browser games. The free browser game DarkOrbit is guaranteed to provide you with hours of gaming fun. Register now and get ready for battle.
Deepolis is an action-packed MMO browser game. Dive into the abysmal depths of the 3D oceans and experience the rapture of the deep. Fight in exciting battles and navigate your sub through mysterious subaquatic worlds and unknown ocean rifts. Use your tactical skills at trading stations and attack enemy confederations and fleets.
With platforming challenges included in every game area, FusionFall’s got the jump on other online games. You’ll be able to jump, bounce, hop and leap through a variety of obstacle-filled environments, all while solving puzzles and completing missions.
City of Steam is a free-to-play unity3D browser-based industrial age steam punk styled MMORPG.
OGame is a strategy-game set in space. Thousands of players across the world compete at the same time. In order to play you only need a web browser.
Ready to play directly in your browser, it features full Realtime spaceship combat with Player vs. Player and Player vs. Environment. Over 500 items to collect, trade and construct. Blueprint based construction system with custum ship crafting Refinement & Recycling system. AI driven NPCs with different tactics & behaviours. Asteroid harvesting to gain 14 different types of rawmaterials. 25+ useable spaceships. Full Player based market. Over 8 powerful premium ammunition types with special side effects. Hundreds of dockable stations. 60+ default avatars to choose from. And a rank system with 30 reachable ranks.
Pirate Galaxy is the award winning science fiction MMO about the resistance of mankind against an alien species called “Mantis”. It’s free to play and provides real time 3D graphics directly in your browser. Enjoy fast-paced, tactical spaceship combats, become part of a spectacular storyline and invite your friends on exciting missions against the unite enemy.
Become a Soldier, Purist, Mutant or Cyborg in this expansive, futuristic browser based roleplaying game!
In the strategy game SpaceInvasion, it’s your mission to become the commander of your own Imperial space force and set out to conquer undiscovered planets, found your own space colonies and mine raw materials. You’ll need to establish your own industries and build your own defense installations in order to protect yourself in this inter-stellar strategy game. They’re a definite must at SpaceInvasion: The galaxies here are brimming with legions of enemies, all of whom would love to get ahead at your expense. Protect your base and defend your honor – they’re one and the same in the strategy game SpaceInvasion. Without them you’ll be nothing, a tiny speck of space dust in the unending emptiness of the vacuum.
The Earth is destroyed – space miners stationed in the Asteroids fight to survive. Gamble, mine, upgrade and customize your ship, research weapons, shields and engines technology! Fight, raid, bomb and trade with other Star Pirates! Join forces and become part of a Fleet! Assemble into Armadas!