UnderGrow, a free online growing simulator, is now playable in the browser on PC and mobile at https://undergrowgame.com. Developed by a small independent team of growers and gamers from Mendoza, Argentina, the game simulates a full cannabis grow in real time, with one in-game day equal to one real hour. Players can expand their grow space from a small corner at home to a grow tent, room, garden, warehouses, and an open field, with every plant tended by hand, including watering, feeding, inspecting, pruning, treating pests, and harvesting at the exact moment by reading trichomes. The game features a full cycle of germination, vegetative, flowering, harvest, drying, and curing, as well as 60 strains with colorful buds and breeding to create own genetics, a business layer with markets, customers, and employees, and online features like partnerships, chats, and world rankings. A new player starts with a gift from the Lucky Old Man, their grower neighbor, and a built-in grower's manual explains everything. The game is available in English and Spanish, with no ads, and is intended for players 18 and over.