9341 is assigned to testing with SCP-173. The player takes on the role of D-9341, an unwilling test subject for the shadowy SCP Foundation, a group dedicated to the containment and research of anomalous artifacts and lifeforms. Regalis (the game's creator) has confirmed that more SCPs, including a key which unlocks a door to a parallel universe and an invulnerable reptilian creature, will be added to the game later.
Some enemies, such as SCP-372 ('Peripheral Jumper'), cannot kill the player, but serve to hinder them. Version 0.6 saw the addition of SCP-096, a normally docile humanoid that will attempt to kill the player if they make eye contact with its face. The second main enemy, known as 'The Old Man', can pass through solid matter and attacks by sending the player to a 'pocket dimension'. The game's primary mechanic is the Blink meter, which displays the amount of time until the player must blink - the primary antagonist, SCP-173, is a hostile statue which instantly kills anyone it encounters but is unable to move under a direct line of sight. The player guides a test subject, D-9341, through many obstacles inside of a facility belonging to the shadowy SCP Foundation.