Download the Zip file through the link above (NO NEED TO SIGN UP).
Right click on the file and Unzip the 'Lost-in-Hell-DEMO' folder to desktop.
Open 'Lost-In-Hell' folder and run 'DiacrisisDLC.exe'.
There is a 'README.txt' file with game instructions for help.
There is no tutorial installed yet, so follow these instructions:
GAME ACTION | KEYBOARD BUTTON
Movement - A, S, D, W
Sprint - Shift
Melee Attack - Q
Jump - N
Action, Pickup Obj - E
Revolver - Space or MouseClick
Shotgun - M
Dynamite - J
Assault Rifle - K
Reload - R
Look - H
To quit game | Alt + f4 (no pause menu installed)
New Game | Erases memory and creates new game.
Load Game | Load last checkpoint saved on memory.
That's the Alpha gameplay.