Can anybody tell me how to restart at a particular mission without having to play the game from the beginning? I was at Katasmu or something like that when my computer broke down and I lost everthing and I would hate to start at the beginning if I didn't have to.

Cheats
Edit the target shortcut to \SOF2\SoF2.EXE +set sv_cheats 1.
Then, you can press the tilde key '~' to open the console. Then type setrandom sv_cheats 1 and press Enter to enable cheat mode.

Toggle God mode
god

All weapons and ammo
give all

Spawn indicated item
give "item name"

Armor
give armor

Full ammunition for current weapons
give ammo

Health
give health

Stamina
give stamina

Unlimited power
pinkspider

Disable enemy AI
notarget

Never get tired
nofatigue

Toggles no clipping mode
noclip

Change gravity, 800 is default, 0 for flight
g_gravity 0-800

Change movement rate, 320 is default, lower is slower
g_speed "number"

List console commands
cmdlist

Suicide
kill

Exit game
quit

Display current map name
mapname

List maps
dir maps

Advance to indicated map
map, spdevmap or devmap "level name"

Level select icon at main menu
raven 1

Change player's name
name "text"

Toggle windowed and full screen, restarts game
toggle r_fullscreen

Show current server settings
serverinfo

Reconnect to last server
reconnect