Test Tube: The Wrap Up - "--- MAP LEAKED ---"
Part of "Test Tube #10 - The Wrap Up!" To avoid giving out any spoilers for this map, I won't mention anything about this map but will still say that it's fantastic given what it aims for.
You can get Test Tube: The Wrap Up as a map pack here: https://www.moddb.com/mods/map-labs/d...
It's highly recommended to have Half-Life 2 and/or Half-Life 2: Episode Two installed when trying out this map pack.