Dead Trigger 2 is a 2013 multi-platform first-person shooter by Madfinger Games.
This is a local copy of Dead Trigger 2 made with Unity 5's Web Player exported to WebGL using Emscripten.
W/A/S/D (or arrow keys) to walk, mouse to look, Q to switch weapons, Tab to switch to meleé combat, and 1/2/3 for special powers.
Serve the files from a simple web server.
If you don't have one, create one:
python -m SimpleHTTPServer
Then load http://localhost:8000/.