Spy

Spies are special infantries that are only found through Mystery Crates. Whichever player gets a spy crate, they will change into a random infantry class from their opposite faction (ex. A GDI player might become a Nod Flamethrower). While the spy has all the stats of the newly acquired infantry, they will also be detected as friendly from the enemy's base defenses, both small ones and their main defensive buildings; therefore, automated base defenses will not fire upon the spy.

However, veteran players will see the message broadcasted that warns them of the presence of a spy and they will be on guard and fire upon their teammates as well, while also keeping an eye on the radar, since a spy will not appear as a dot on the mini-map, compared to a friendly member. Lastly, a spy will not display their nickname to their enemies, thereby, a smart player will not be fooled and it will either fire on the spy or pretend to ignore them at first before firing.

It is advisable for a spy to hide from enemy eyes, since the message will not tell which kind of infantry the spy possesses; thus increasing the chances of a potential infiltration in the enemy base. In matches with plenty of people, the spy can also remain in base and wait for their opponents to forget about their presence.