Here are the cheats for this awesome game. Just do the following steps:
1.) Change the properties of your game shortcut and add
+set sv_cheats 1 behind your EXE
Example: D:\GAMES\SOF2\SoF2.EXE +set sv_cheats 1
2.) Edit your base\myconfig.cfg and search for "toggleconsole".
Here you can define any key you want to toggle the console ingame.
Example: bind X "toggleconsole"
3.) Start the game and open the console and type one of the following cheats:
NOCLIP (you can go through walls)
GIVE ALL (gives you all the fine weapons)
NOTARGET (enemies won't hit you)
PINKSPIDER (gives you infinite power)
KILL (guess what)