This is a fan-created mod for SCP: Scrubs & SCP Cleanup. It's a cleanup after the player's first visit to Site Epsilom. Joonas Regalis Rikkonen has implemented some features that make this mod extra challenging, while still retaining the "Vanilla" feel of the series. For example, there are monsters inside the containment area, and a "monster truck" type vehicle has spawned from the remains of one of them. The monsters can also be triggered through proximity to an "ice box". The ice box can be damaged, forcing the player to drop something into its liquid state (water, oil, or food).
Some notable additions to Joonas Regalis Rikkonen's design for the SCP: Containment Breach mod include custom music, scripted lines, and the Unity button (to activate/deactivate the mod). If you find any bugs, suggestions, or errors in this mod, you may leave a message on the author's page with a link to an alternate download. I tried using the Unity button in vanilla SCPs but it showed up as an error, so I edited the file to use the "Play" button instead. Since the SCPs are all archived, you will need to use Joonas Regalis Rikkonen's.ini to replace the files. Otherwise, you won't be able to load the game!
If you're looking for a free survival horror game based on the containment breach phenomenon, you've got two choices. You can play the official Orbus Plus version, which is available on my website, or you can play the fan-made version Joonas Regalis Rikkonen created. If you like the fan-made version, you should check out Joonas' other creations, which are all free to play! In my opinion, this is the best fan-made version available, with excellent art and sound, as well as excellent scripting for the containment protocols. Check it out!