here are some cheats for portal flash version

zomg
lol
roflcopter
lolcopter
time
console
zomgowned
zund
info
flash
lost
stop
cake
portal
wecreatestuff
pie
dance
die/kill (same thing)
gravity * (* = number(I usually go for 100))
gotolevel * (Level 0 is fun)
god
create turret
createball
createbox
createcompanion

Hvae fun