The spy doesn't have the strongest weapons, but he makes up for
it with his ability to become invisible and sneak up on opponents.
The spy's knife can deliver a quick kill when attacking from behind.
The spy can also sneak up on sentry guns while cloaked and use
grenades or his shotgun to destroy them. The spy remains cloaked
while firing his weapons, but he will not be able to cloak while
carrying the flag.

The cloak works best while moving slowly or when stopped. Running
causes the cloak to be less effective. Be careful though. The cloak
does not provide protection from lasers or tripmines. The marine's
turret grenades can see through the cloak as well.
