What Are These?
Essentially they allow you to skip a portion of the mission at the press of a key. They can be useful if you want to get through parts of a mission you've already done and lost/quit.
Keep in mind that these were made for easy testing and debugging so there are a few cases where pressing keys in the wrong order or randomly can cause you to lose or crash your game. Use them wisely if you really feel the need to use them.

How Do I Use Them?
Copy the text inside and dump them anywhere in the Update function (the part which says function ______:UpdateActivity()) of the relevant script.

Suburbs: No cheat keys

Tenements:
C - puts Jack near Scarlett.
V (held) - makes and explodes the bombs that the give the ronin entry passages.
B - halves the amount of time it you have to defend, pressing twice will quarter it, etc.

Towers:
C - moves all of your actors to the bottom area (where the turrets are), you proably don't want to use it until the generator is destroyed.
B - kills all the turrets and the generator; essentially skips to the generator being destroyed.
V - gives scarlett the intel disk, walk in and out of the base to skip to evacuate.
N - skips to the waiting for intel part, kills the turret in there and all enemy actors, moves scarlett into the area where you have to wait.
M - heals all of your actors fully
Z - spawns WEC ships as needed


City Prison:
C - puts Jess and Shadow in the prison area, below Jack.
B (ONLY USE AFTER B) - skips to the holdout phase, moves everyone up to the evac zone.
V - skips to the evacuation phase.

The Bank:
C - skips the first part; kills all enemies there, gives you the money, skips to the relevant text, moves everyone to the grassy center area.
B (ONLY USE AFTER C) - skips to the last part; moves all of your actors to the vault by the incredidoor, adds the relevant funds and opens the incredidoor.
V (ONLY USE AFTER C) - does the same thing as B but without moving your actors.
N - moves Tanya into the underground chamber if she isn't in it and moves her out of it (to the grassy center of the map) if she is, this allows you to easily get the remote.
M - clears all unheld items that aren't Unitec. Happens periodically to reduce MO count anyway.

Skyrise: No cheat keys

Office:
C - puts Jess in the last cache (the one closest to the teleporter), gives her the relevant weapon and sets it so she'll get all of the weapons when she respawns.
B - skips to the evacuation phase, moves Jess to the evac area.