Per 
Special Containment Procedures:
Box art of SCP-XXXX during digital processing.
REVISION 24-2
SCP-XXXX is to be stored in a 14-gauge steel container welded shut from the outside. SCP-XXXX's container is to be electrified to no less than 2000 volts at all times. The room in which SCP-XXXX is stored is to be subject to constant video surveillance in order to deter individuals from attempting to access SCP-XXXX. No individuals are permitted to access SCP-XXXX at any time.
Description: SCP-XXXX is a moderately worn cardboard container measuring 23.1 x 2.9 x 30.2 cm. SCP-XXXX appears to serve as the container for a tabletop role-playing game entitled Doppelganger - a game of intrigue. Barring this and an illustration of a knight on horseback, there are no visual indicators or inscriptions on SCP-XXXX which connect it to any manufacturer.
The following components were contained within SCP-XXXX at time of discovery:
- 20 (Twenty) sheets of standard A4 paper
- 10 (ten) plastic 6-sided die
- 5 (five) graphite pencils
- A 21-page rulebook
SCP-XXXX can be played by up to five players at a time and involves participants designing characters for a wide variety of fictitious settings. Characters created for SCP-XXXX may perform various actions as determined by the participant, with success and failure dictated by rolling a pair of 6-sided die. SCP-XXXX forgoes the use of a 'game-master' typical for table-top role playing games and instead instructs it's participants to improvise their own narrative as a group.
Exposure to SCP-XXXX constitutes participating in a session of play. SCP-XXXX's anomalous effects are not initially apparent, but will begin to manifest after approximately 5 minutes of exposure. At this time, subjects participating in SCP-XXXX, regardless of their social disposition and affinity towards role play, will begin to act and communicate as though they were the character to which they were assigned - eventually foregoing their persona outside of the game entirely. A session of play with SCP-XXXX generally continues until the participants are either forcibly removed from the game or are incapacitated.
SCP-XXXX's anomalous effects continue after a session of play has concluded, with participants coming to believe that they are in fact the character which they had played during the session. Subjects who have entered this state are designated SCP-XXXX-A. SCP-XXXX-A will deny the existence of it's original identity, insisting that they always have been the character to which they were assigned.
Of important note is that the cognitohazardous effects inflicted by SCP-XXXX are not limited to SCP-XXXX-A. It would appear that all individuals previously familiar with an SCP-XXXX-A instance's original identity are also affected by the anomaly, believing SCP-XXXX-A to be the persona it is claiming to be. Persons previously familiar with an SCP-XXXX-A instance appear to have their memories altered in order to coincide with any change in identity. This cognitohazardous effect appears to be widespread and universal, with individuals who have not interacted with SCP-XXXX-A instances in many years appearing to exhibit this anomalous influence.
