An open world is a type of video game level design where a player can roam freely through a virtual world and is given considerable freedom in choosing how or when to approach objectives.[1] The term “free roam” is also used, as is “sandbox” and “free-roaming”.[2][3] “Open world” and “free-roaming” suggest the absence of artificial barriers,[4] in contrast to the invisible walls and loading screens that are common in linear level designs. An “open world” game does not necessarily imply a sandbox. In a true “sandbox”, the player has tools to modify the world themselves and create how they play.[5] Generally open world games still enforce some restrictions in the game environment, either due to absolute technical limitations or in-game limitations (such as locked areas) imposed by a game’s linearity.