Blood
Grade: A / D
Blood allows you to disable the hud in the normal version and in source ports such as NBlood.
The new "remaster", Blood - Fresh Supply, has menu options to disable the hud and crosshair, but the game has a glitch which causes the hud and crosshair to reappear when you load a save or start a new level if you have the crosshair disabled in the menus.
To circumvent this glitch, I've created a transparent crosshair file. Unpack the zip into your Blood - Fresh Supply installation directory (it has a folder called "mod" and inside is a file that contains the new transparent crosshair sprite.
This is only needed if you want to play the game with no crosshair.