This is one of the scariest games I've played. All the enemies are very unique and each behave a specific way, they feel very fresh and interesting. No boring zombie patrolmen like the ones in games such as Amnesia or Outlast. You'll constantly be on edge and on the lookout for the various monsters that'll ruin your day if you mess up. The world is randomly generated too so no two playthroughs are quite the same. If you can get past the mediocre visuals, it's definitely a game you should check out. It's free, too!
SCP Containment Breach draws from the fictional SCP Foundation wiki, which describes supernatural creatures, objects, and other phenomena ("SCPs") that are under confinement and observation at a secret underground facility.
The player character is a D-Class personnel, one of a group of convicted felons brought into the facility to perform tasks too dangerous for the SCP Foundation's personnel. In the game's opening, the player and other D-Class are sent into the chamber containing SCP-173, a grotesque statue capable of snapping people's necks while no one is looking directly at it. When the player approaches the SCP, the facility's power suddenly goes down, allowing the SCP to escape and kill everyone in the vicinity. Only the player survives, and must find a way out while avoiding SCP-173 and several other SCPs that have escaped confinement.