In Control Resonant, players can discover secret hideouts throughout the game world, with one such location hidden behind a puzzle in the Urban Fresh Mart. This particular secret, found in the West Incursion Zone north of the Museum of Curiosities and south of the House of Mirrors, rewards players with an upgrade point and lore collectibles upon completion. Successfully finding all secret hideouts also unlocks the Backroom Espionage trophy or achievement.
The puzzle involves a cash register and a soda machine within the Urban Fresh Mart. Scattered clues, including a note stating the distributor is "reversing the drink order" and another mentioning blinking lights on the soda machine, point towards the solution. Interacting with the soda machine causes a sequence of lights to flash.
To solve the Urban Fresh Mart cash register code, players must note the number of lights that flash when the soda machine is activated. This number sequence, when reversed, serves as the code for the cash register. The specific code required is 1213.
Upon entering 1213 into the cash register, a hidden wall at the back of the store will open, revealing the secret hideout. Inside, players will find various collectibles and a health upgrade point.