The phrase identifies a category of mobile games characterized by procedural generation, permadeath, and often, turn-based gameplay. Examples include titles that offer unique and challenging experiences each playthrough, where death necessitates starting over from the beginning.
This genre provides players with high replayability and a sense of accomplishment. Its origins can be traced back to early computer games, with modern iterations adapting classic mechanics for mobile platforms. A successful title within this category offers depth, strategic decision-making, and a high degree of challenge.