The only tech you need to learn to run this game is the Cruci-FIX tech. Pressing space on your keyboard to draw your crucifix, then pressing Escape twice will allow you to move around and deal damage with your crucifix.

Runner Vynnada also found that you can scroll through text faster using the analogue stick of a wired Dualshock controller, too. Useful for all endings.

The game responds to controller inputs quicker than keyboard inputs.
Quicker speeds in return while using a controller when reading notes and in areas such as when John spawns in through demonic form etc.