OP 2.2 Brainrot

OP 2.2 Brainrot is an phenomenon that mainly consists of playing OP 2.2 for a long time without any major breaks, despite the apparent soulcrushing feeling that OP 2.2 also gives.
Despite its notorous features such as the Plague, Artifact Decay, Turrets, and flies, the long playtime of OP 2.2 makes even the most diehard fans barely scratching the surface of its multi-part questlines, stashes testing your understanding of S.T.A.L.K.E.R.'s physics, and the hoarding questline being the Secret Weapon of the Monolith. 
One achievement stands out among the rest and is considered the endgame of OP 2.2, and it is the S.T.A.L.K.E.R. achievement. This represents the peak OP 2.2 brainrot, as just like OP 2.2, its timeconsuming nature attracts those who are masochists in the game, willing to suffer countless hours, days, and possibly months just to get a singular achievement. One who claims the achievement has successfully completed the brainrot, possibly ruining their mental health just for an achievement with lasagna-tier achievement requirements.