Here is a realistic low poly washbasin sink which will look great in any game scerenry and is free to download however you will need to add your own textures and animations to it.
This sink is based off a real sink made by a known bathroom company.
Wellworth and Wellworth Classic and Highline Classic matching toilets are also available to download.
This model would also look great in the Sims 3 and Sims 4 and even Garry’s Mod although I am not really a person who can port models into games as I find this difficult at this moment and time.