If you can’t get enough of Club Penguin, you’re not alone. Disney’s web-based MMO is huge, with over 12 million registered user accounts. Still, one game can’t hold anyone’s attention for very long so we’ve rounded up a list of games like Club Penguin.Whether you’re looking for a fun, safe (and free) browser-based game for all ages or you’re a kid looking for a place you can game with other people your age, there should be something on this list that appeals to you.Spiral KnightsSpiral Knights is the newest game on the list, and probably one of the most dynamic, attractive, and fun for all ages. It’s not just a browser game: you can download a game client and play locally on your computer, but you can also play using the in-browser Java engine without downloading anything.The game was developed by Sega, and was recently one of the first free-to-play games to land on Steam. In the game, you’re a Spiral Knight, who can use guns, bombs, swords, shields, and other armor to attack and defend yourself in a strange world that you’ve been stranded on. You and the other players can freely socialize and interact in Haven, a central game hub where you’ll meet other players and form the groups that you’ll need to take on the outside world.Spiral Knights is probably most notable because of it’s attractive design, wide variety of armor and gear types to customize your character with, and its really interesting and fun gameplay. Players descend into “Clockworks,” where you and your group have puzzles to solve and enemies to fight off. As you progress, you earn more gear, you earn Crowns (the currency of the game) and Energy, which you spend to get into clockworks or unlock areas. When you run out of energy, you have to wait for it to replenish before you can continue playing.The game survives on micro-transactions, and the concept of energy is n example. Even if you run out of energy, you can spend Crowns in-game to buy more, or you can spend real money to buy more and get back into the action. Aside from spending money on energy and “crystal energy,” (required for end-game crafting and content) the game is entirely free.Cartoon Network Universe: Fusion FallFusion Fall is a free, web-based game like Club Penguin that you can play in your browser, built by Cartoon Network and Grigon Entertainment. The game is a third-person adventure game that allows you to customize an avatar to represent yourself in the game. You’ll encounter characters from your favorite Cartoon Network series’ including Dexter from Dexter’s Laboratory, Ben Tennyson from Ben 10, Rex from Generator Rex, and more.You can choose one of those characters to be your guide through the world, and once you start to level and progress through the game’s content, you’ll meet other characters and go on missions that they issue to you. By completing those missions, you’ll earn your way towards collecting Nanos, or smaller incarnations of popular Cartoon Network characters. As you collect Nanos, you’ll gain levels, be able to go on more missions, and earn more and better gear for your character.You’ll want the help of other players to complete many of the missions though, so you’ll need to work together with others who are playing in the same world.Gaia OnlineGaia Online is more of a massive community than it is just an online game, but there are plenty of ways to keep busy, even if you don’t use the forums. Gaia Online started as a community and portal for anime fans and fandom, but quickly grew into a community where users are represented by avatars they can customize.You use your avatar to play third-party action games, to interact with other users in real-time chat, play zOMG (Gaia Online‘s new combat-based MMORPG,) go fishing, drive your custom-built Gaia Car to race with other players, or play over a dozen other mini-games to pass the time. If you do want to get into it with the rest of the community, you can always hang out in the forums, which has a broad cross-section of people from across the globe, all online 24-hours a day.Gaia Online is free, but it’s definitely targeted at an older demographic than games like Club Penguin or Fusion Fall, and the game has had some notable problems controlling the members of its community.RuneScapeRuneScape is the oldest game in the roundup, initially launching in 2001 as a browser-based Java game that still manages to incorporate 3D graphics. The game is free-to-play, and allows you to customize the avatar you’ll use to explore a top-down 3D world. The game plays like other MMORPGs that you may be used to: you look down on your character as you move through the world, kill monsters and complete quests, pick up gold and items, and level up your character.RuneScape is probably the most traditional of the free MMOs in the list. Where the others tend to focus on the social aspects like Club Penguin does, RuneScape is definitely a hack-and-slash fantasy game designed less to be a social network with gaming attached and more of a game with social features and forums attached.Regardless, it looks gorgeous, it’s free to play, and if you want the some of the experience of a desktop-based RPG without paying for it or visiting the video game store, RuneScape can give it to you. As with other games like Club Penguin, you only get so much of the game’s content for free. Sign up for a paid membership, and the world will open up for you: new zones, higher levels, more quests, new skills, and no ads.Free RealmsFree Realms is one of the first and largest browser-based MMOs. The game was developed by Sony, and is targeted at the 10+ set. The game exists entirely in a 3D world where the player can customize their avatar, go on quests and missions, hang out with other players in dance clubs, play mini-games like go-kart racing and demolition derby, or armor up and go out into the wilds with other players for real-time combat.The big success of Free Realms is that there’s a wealth of things to do and people to interact with. The game has tons of players, and if you don’t like the fantasy-style type of game and would prefer to do professions like cooking or crafting, there’s enough of that in the game that you can do it without getting bored. If you prefer to race, you can do that full time as well. If you’d rather just chat with others, there are plenty of places to go hang out.Despite the name, you can’t get past level 4 in Free Realms without a monthly paid monthly subscription. Once you have a subscription, you’ll get special benefits like monthly reward packs, the ability to access all of the game’s jobs and professions, access to members only items, and more.Any recommendations for networks or games like Club Penguin? Anything we miss in this round up? Tell us below.