Portal Menu image - Source - Generic Mod Files for Half-Life 2 - Mod DB
The Orange Box - Half Life 2 - How to get 'Flushed' achievement - YouTube
World's Slowest Before-and-After: The Micro-Bathroom Makeover, PART 1 | projectophile
Steam Community :: Guide :: "Blast from the Past" and "Flushed"
DeerValley DV-1F026 Ally Dual Flush Elongated Standard One Piece Toilet with Comfortable Seat Height, Soft Close Seat Cover, High-Efficiency Supply, and White Finish Toilet Bowl (White Toilet) - Amazon.com
Half-Life 2 Achievements | TrueSteamAchievements
What level can you get the Flushed achievement? - The Orange Box Q&A for Xbox 360 - GameFAQs