Immigrant

Immigrants are people who take part in the game in the. They are people from the original world who, after a collective near-death experience, are sent to the  and forced to play life-risking games in order to return to the real world.

Immigrants are victims of the "Tokyo Meteorite Disaster" who suffered cardiac arrest and their consciousness ended up in the.

On the night of their arrival, once instructed they must make their way to the designated game area to participate in their first game or they will be killed by a deadly laser from the sky. If they survive their first game, they will be given a visa based on the difficulty of the game. The visa will allow them to rest from playing games, before they will need to play another game to collect a visa extension. However, a visa isn't their only reward from surviving the games. Each game they survive, they gain a playing card. If all 52 playing cards are placed in a stack it will create a circle of health. Everyone who enters the circle of health before the sun sets on that same day the stack was made will be able to leave the  as a free, healthy, living citizen.

In order for an Immigrant to participate in a game, they must "register" before the cut-off time by entering the designated game zone that changes every night. Upon entering, they may not leave without clearing the game (if they do try to leave they will be shot by the infamous laser) the rules of the game are explained by screens and each player is often provided with items necessary for the game. The games are divided according to their category and their difficulty, designated by a playing card. The number represents the difficulty being more difficult the higher the number, while the suit represents the type of game that will be played: spades (physical), diamonds (intelligence), clubs (cooperation) and hearts (psychological).

Credit to https://aliceinborderland.fandom.com/wiki/Player.