Rightclick the Desktop Icon of the Game and add: enable_system_console=true
to the target path.
e.g.: C:ProgramFilesUfoAftershockUAS.exe enable_system_console=true
There must be a "blank" between the added words and the target destination path
Then you save the settings and normally start the game.
Ingame you can now open the System Console by pressing the ":" button on keyboard (german it is the "ö" button on keyboard)
Now you can enter codes in the commandline and edit nearly all settings by only opening the System Console.
You don´t need to edit savegames or something else complicated.
The Console works in Strategical and Tactical game, with different Codes possible.
CAREFUL! Game doesn´t stop while you have opened console, so be aware to have the game paused.