Roblox is a socially focused massively-multiplayer online (MMO) game created by Roblox Corporation for iPhone, iPad, and Android mobile devices.
Player accounts are created & are shared universally across all supported platforms, so gamers can join their friends online no matter which type of device they're on.
The goal of Roblox mainly revolves around enjoying social interactions with other players, completing various objectives and mini-games, and customizing your online avatar/character.
Playing the game is mostly focused around the enjoyment of socializing with other players; so if entertaining yourself by socializing online isn't something that you enjoy, it might not be the best game for you.
I say this because the graphics and engine are both very resemblant of Mincecraft, and if you don't intend to be chatting or interacting with others there is a good chance the gameplay will eventually grow old to you.
Players can play through the game and complete objectives for their enjoyment entirely for free, and they can also choose to spend real money in the in-game store for Robux. Robux is the in-game currency of Roblox, and is used to buy new items, clothing, equipment, and more.
Robux used to be able to previously be earned by playing the game for free, but game has since been updated so that players will need to spend money in order to attain new items for Robux. While this change did understandably cause some controversial and negative reactions with some players, it's important to consider just how large the game's player base has been getting.
We need to first consider the fact that over 5 million active users playing this game (it could be well past that mark by now too), and then the cost of the servers that must be required to maintain all those players' game sessions and information, it's at least slightly understandable.
Some mobile games require you to pay money to buy the game before you've even had a chance to play it. Due to this, I don't have a problem with Roblox using a free-to-play model that, while it does make it a game that you're likely to eventually spend money on, it's still generally a reasonable price model if it's a game that you enjoy.
While Roblox is a game that is marketed with kids (age 8-18) in mind, there are a few things to keep in mind if you're considering letting your child play this. There is online text chat in this game, which is one of its' greatest strengths, but also one of the risks you need to be aware of regarding your child.
Considering that this is an online social game, there is really no way to control who is able to play it or what they're able to say in chat. As a parent your child may see language you don't approve of, and you should ensure they know not to give out their personal details to strangers.
Overall, I would recommend Roblox for anyone who is interested in this type of online social gaming genre. You can create an avatar with a variety of options that allows you to express yourself, and meet and interact with tons of people online in a variety of different ways.
Note that the game is free, but if you continue to play you are very likely to eventually to want to make an in-game purchase(s), but they are generally reasonable aren't necessary to enjoy the game.
In order to start playing you just need to create an account and then log in with it on the gaming platform of your choice. Let me know what you think of it!