Here's a very unfinished Youtube demo of Yamaku Scavenger Hunt, using Unreal Engine 4.
https://www.youtube.com/watch?v=sE-rg7sysFU
Special thanks to Mike Inel for use of his 3D KS models (very much modified). The mac version can be downloaded here (375 MB)
https://archive.org/details/YamakuDemo2.app
The PC version can now be downloaded here (398 MB)
https://archive.org/details/YamakuDemo2
Controls
switch player
F1=Emi
F2=Rin
F3=Hanako
F4=Lilly
F5=Shizune
F6=Misha
WASD keys for movement (W=away from camera, S=towards, A=left, D=right)
Also uparrow=away from camera, downarrow=towards, leftarrow=rotate camera left, rightarrow=rotate camera right
Mouse wheel zoom in/out
click + move mouse turns player
Playing as Lilly is very rudimentary right now.
Hardly any camera intelligence, it clips through pretty much everything.
There is a white flash the first time you click on the game; that's a UE4 bug.
The video is SFW; the game is SFW, unless you look up their skirts, or clip the camera through people, or find the naked pool party.
PS: also try the finished game Donkey Kenj here:
https://archive.org/details/DonkeyKenj
Mac, PC, and Linux