Console Commands:

To activate all DOOM 2016 cheats, during gameplay you should press on the ~ (that symbol is a tilde) key to bring up the command console. After that you can lookup below what cheats there are & what their codes to enter are.

This list start with the cheat and behind it is the code to enter into the command console…

- To activate the DevMode enter DevMode_enable 1
- God Mode: cvarAdd g_permaGodMode 1 (or try simply typing in: god)
- FOV Change: G_fov xxx (xxx is desired number for Field Of View)
- Show FPS: com_showfps 3 (shows the Frames Per Second on-screen)
- Cheats List: Listcvars (brings up all the cvar commands, but only God Mode works in the consumer version of the game)
- Commands List: ListCmds
- Game Speed Change: /timescale x.x (replace x’s with numbers, 1.0 is default game speed, 0.8 is 20% slower than default, 1.2 is 20% faster than default)

Note:
The save isnt technically corrupted. its just looking at it from a different point of view. load dev mode each time you play and it will be fine. devmode_enable 1
type that, go back to the main menu, then enter the campaign menu again and the save should load.
Thanks to @DeaconTaylor .

[WORK-IN-PROGRESS: Please check back regularly for potential Dev Console or Cheat Mode cheat codes! Please be patient as i'll keep this guide updated with the latest cheat discoveries]

By completing the game, you can go back to the begin. Theres a rune that makes all ammo unlimited if you have over 100 armor. Couple this with Godmode and you have unlimited ammo for standard weapons.
Thanks to @RedCreep