A VR boat simulator I developped with the help of a 3D artist friend (http://2a3dartist.com/). Again this simulator is now used every day to treat dozens of patients suffering from dizziness ! Pretty cool, isn't it ?
I did everything related to programming, effects and audio; some cool stuff:
Realistic ocean simulation with height, wind, orientation and speed parameters
Smart voxel-based buoyancy that leads to a plausible yet tweakable ship movements
Fully dynamic weather: it can be sunny, rainy, stormy, foggy and anything in between
Fully dynamic time of day ! Without using Unity's built-in dynamic GI (to save performance, we're in VR).
Sounds: I had a bit more time to work on this one and had a lot of fun with seagulls and water sounds !