Doom

View credits:
Reset the game three times.

Hint: Real first episode completion:
You may have noticed that sometimes when you complete the first episode, the game returns to the title screen. You cannot continue to the second episode from the first episode if you are playing at the two least difficult settings.

Hint: Inferno: Easier difficulty:
To make the "Inferno" chapter easier, complete the "Shores of Hell" on the "Hurt Me Plenty" difficulty setting. You will start the "Inferno" chapter on "Hurt Me Plenty" instead of "Ultra Violence" or "Nightmare" settings.