I created a particle system friendlymode.pcf and placed it in tf/particles/. In it, there's a particle named friendly. I copied the particles_manifest.txt from the .vpk to the same location as friendlymode.pcf, and added the following line at the end, before the closing bracket: Code: "file" "!particles/friendlymode.pcf" Yet, the particle is still not visible in the test map. The .bsp loads with these errors: Code: Attemped to precache unknown particle system "friendly"! Attempting to create unknown particle system 'friendly' I don't know what I am doing wrong, any help gladly appreciated! Spoiler Yes, "Start Active" is set.