If you have kids, chances are that you’ve seen them playing fortnite — the game so big that it’s shown up in Avengers movies and congressional hearings. With millions of rabid fans, it’s one of the most popular games in history and, some parents say, can be addictive. It’s also immersive and can encourage children to keep playing in order to get better at the game or earn a higher rank.

Developed by Epic Games, fortnite is a multiplayer game where players compete against each other in player-versus-player combat to be the last person standing. It’s available for PlayStation, Mac, Xbox, Windows, and mobile devices. It has several different modes, including a co-operative (played with friends) mode called “Save the World” and the standalone free-to-play “Battle Royale” mode.

Players start each round with nothing, skydive onto a small island, and then have to scavenge weapons and other items to survive in an ever-shrinking battle zone. The game has a social element, as users can chat to each other via text and headsets. Popular YouTube personalities and social media influencers have created tutorial videos on how to play, boosting the popularity of the game.

Because the game is so widely played, it’s possible that your child could encounter other players who don’t set the best examples of sportsmanship or online safety. This can be a good opportunity to talk with your child about what’s appropriate online behavior and how to handle a difficult situation. It’s also important to remember that, although the game is free to download and play, many users spend money buying in-game items, such as outfits or weapon skins.

It’s hard to overstate fortnite’s popularity, with people playing it on almost every device imaginable. The game requires an Internet connection, and is accessible on the latest gaming consoles (PlayStation 4, Xbox, and Switch), computer systems (Mac and Windows), and some Android mobile devices. It’s even possible to play the game across platforms, with users able to create an account on any device and carry over their progress to another platform.

Fortnite is rated T for Teen, and it’s not unusual to see teens spending hours on the game. While the game does feature violence, including gunplay, it’s largely cartoon-like and doesn’t resemble real-world violence. However, it’s worth noting that the game does include the ability to buy guns and ammunition. It’s also possible to purchase in-game currency, V-Bucks, to unlock new characters and other cosmetics.