Receiver 2 contains cheat codes. All cheats from the previous game carry over, along with some new ones

All cheats can be inputted by simply typing during gameplay, no in-game console or menu required!

Receiver 1 cheats (carried over)
IDDQD - God mode
IDKFA - gives full ammo (careful to spell it right... K is now an instakill key)
SLOMO - ULTRA SLOW MOTION (doesn't work with Media mode enabled)

Receiver 2 Cheats
INSIGHT - force rank up
RECEIVE - +1 tape
NOCLIP - No clip... can take a few tries to activate. (easier in debug menu)

There is also a cheat to change weapons, bear in mind IT WILL RESET THE LEVEL in order to do so.
Change weapon requires you to type gimmegun followed by a number between 1 and 9

GIMMEGUN# *

*Gun #'s
1 - S&W Model 10
2 - Colt detective special
3 - Colt M1911
4 - Glock 17
5 - Beretta M9
6 - Hi-Point 9mm
7 - Sig Sauer P226
8 - Desert Eagle
9 - Colt Single Action Army

Use Ctrl + F12 on the pause menu to activate

Opening the debug menu gives access to more cheats and options. as well as this it includes some features that aren't even included in the game. Bear in mind it is buggy and very likely to cause issues.
it was used by the developers to use during testing. If you get bugs or crashes during it's use, it's technically user error, not the games fault.

that aside here are a few features (and spoilers)

Becoming invisible to enemies
Removing all enemies
Piloting drone enemies
spawning enemies
loading levels/force loading cells (some spoilers in level names and level files
the debug menu also contains some enemies that aren't in the game, such as alluding to "game ending bosses", like the GUNSHIP or Sniper (the sniper semi works).

There are also some enemies that aren't in the spawner list but are mentioned in the cell edits those being trip mines, power leech and bomb bots (bomb bots have a WIP model but don't function in-game)

As well as this there are cut levels, notably a receiver compound, shooting range and a test level that contains bomb bot. plus a level that contains a Receiver 1 style ending