Warning: Level 4 access granted. Do not proceed unless you're prepared for existential dread.
Here be the most secret of secrets. A place where the air is thick with anticipation and the walls run red with paranoia.
Read the Manifesto
charlie@level4:~$ echo "I'm watching you." | tee /dev/null
Find the Hidden Door
Exit to Level 5, if you dare
Don't say we didn't warn you.