Voiced by Dennis Bateman, who also voiced the Pyro and, for Left 4 Dead, the helicopter pilot in No Mercy, the spy is easily the most complex class to use, and the most deadly. The Spy (when not disguised) is dressed in a team-colored pinstripe suit, balaclava, and tie, and is almost always found smoking a cigarette. In the trailer "Meet the Spy" it is revealed by The BLU Spy that The RED Spy is having a romantic relationship with The BLU Scout's mother. His accent suggests that he is from France.
The spy's primary weapon is a Magnum revolver. It takes practice to master, but criticals are deadly with it. It can kill most classes with a single critical hit.
Next is the Spy's Electro-Sapper. This device emits a powerful electric charge when attached to an Engineer's buildings, slowly damaging and destroying them, if the Engineer doesn't destroy the sapper first.
The Spy (right) as he appears in Team Fortress 2, preparing to backstab an enemy Sniper who is busy killing RED team members (left)Added by BalphezarThirdly is your balisong, or butterfly knife. On a direct hit in front, it will do about 40 damage, making it the second weakest melee weapon for default hits. However it has the ability of killing in a single hit, if used while targeting an enemy's back. The advantage is your enemy won't know who killed them until it's much too late. The disadvantage is that it removes your disguise once you have swung.
Lastly, and likely your most useful tool is your disguise kit, called the Spytron 3000, which is hidden in the Spy's cigarette case. Disguised, a good Spy can sneak behind enemy lines and destroy them from the inside. However, while the Spy can sneak past the enemy defenses, they take a lot of skill, practice, and luck to use effectively, as the defensive is always watching for Spies. As such, when using one, you should study where the majority of the enemy team is, what class they use the most, and use this info to blend in. You must act like one of them, such as coming out of the enemy respawn point and watching what they're doing. When you see an opening to sap some sentries and get away with it, take it, cloak, run away, and switch disguises. This is important, don't keep using the same disguise over and over, eventually the enemy will note what class is usually a Spy and will focus on them.
The Spy has a useful special ability, the ability to render themselves invisible for ten seconds. It is not perfect, however, as being shot and bumped into will disrupt the cloak slightly, making you look like a blue or red ghost, (depending on which team you belong to) revealing your class. It takes a full thirty seconds for it to recharge when completely drained. Also, when cloaked, you will see the spy's wristwatch slowly ticking off green bars. When those bars run out, so does your cloak. You also cannot attack or plant sappers while cloaked, but you can change disguises. One last note is that you should avoid pyros like the plague, as their flames will highlight you, even when cloaked. With one of the game updates the cloaking ability will now replenish whenever you pick up ammo or scrap metal. This also applies to dispensers which means you can stay cloaked indefinitely provided you stay near the dispenser.
The Cloak and Dagger is one of the unlockable wrist watches for the spy. The C&D (as it is referred to a lot by other players in-game.) has the ability to recharge while you're standing still, it even recharges in half the time of the default knife. With the C&D it is very easy to get behind enemies undetected, you can use this to your advantage.
A good thing to do on CTF maps is use the Cloak and Dagger to sneak behind enemy lines, and do what a spy is meant to do... spy. Hide somewhere near the enemy respawn and stay invisible, watching and waiting. Try to stay close to a wall, in the middle of it, as corners are a popular place for enemies to shoot at to check for spies (But almost nobody checks the middle of a wall!). Just wait and watch, giving info to your team when you see something unusual, like a large group of heavies and Medics getting together. Using this, you can warn your team of the impending attack and they can set up to protect themselves. It can also be used to spot enemy Spies. People tend to disguise as soon as they leave the respawn, or while in it, so you can watch for this and let your team know that there is a spy coming and what character he is disguised as. Very useful in matches with large amounts of people.
Never yell "Medic!" repetitively, it draws enemy attention to you, something you do NOT want. Also, the enemy team can see in the chat the voice of who you are impersonating, which is something you do NOT want either.
"Milestone 1: After unlocking 5 achievements in the spy pack, you unlock The Ambassador, A handgun that deals less damage and has a slower rate of fire than the average revolver, but deals amazing criticals on headshots.
Milestone 2: After unlocking 11 achievements in the spy pack, you unlock the Cloak and Dagger, a special invisibility watch. The watch has less maximum time you can be invisible...If you keep moving. The special ability of the C&D is it's regeneration if you stand still. This enables you to spend large amounts of time invisible in enemy territory.
Milestone 3: After unlocking 16 achievements in the spy pack, you unlock The Dead Ringer, another invisibility watch for the spy. This watch works differently than the other two, because it doesn't take effect until you have get shot. When you take damage and have the watch activated using MOUSE2, a fake corpse is left behind and you are instantly cloaked. This may create fake death messages, fake points, and even fake achievements. You have 6.5 seconds to get to cover, or do whatever else you might want to do while you're invisible." -Copied from the original TF2 Wiki. This is not the official TF2 Wiki. Please see TF2 Wiki for the actual website.
First off, don't put on a disguise out in the open.
If the enemy sees you, they'll alert the rest of the team to your disguise choice. Also, if you cloak and are in disguise and bump into someone or are shot by the other team, they'll see your outline so try to stay away from large crowds. Try to disguise yourself as a class that is used by a lot of people on the other team, since the game gives you a random name of one of the enemy players using the class you chose, so if the other team has only one scout, and you disguise yourself as a scout, you always have their name and the player you're impersonating will know you're a Spy.
Avoid running directly into enemies.
Teammates can pass through each other. But the same can't be done to enemies. Which obviously means that if you bump into an enemy when disguised, the enemy team will know you're a spy.
Put a sapper on the sentry and quickly backstab the engineer as he tries to destroy the sapper, or sap the sentry and shoot it to destroy it before the engineer can remove the sapper. (Be careful of other sentries and enemies in the area). It is possible to continually set sappers on buildings and wear down the engineer trying to repair them. If they do not concentrate on trying to damage or kill the Spy while repairing, continuous use of sappers will destroy the building or allow teammates the ability to charge in.
They are every spy's worst enemy, because their flamethrowers will set you on fire no matter what, and they are usually enlisted by engineers to safeguard their sentries.
Pretend to be one of them.
Your number one skill as a Spy is your ability to look like a member of the enemy team. Wherever possible, avoid letting the enemy see you as a Spy. Once they know you're playing a Spy they'll be much more alert. Luckily, the paranoia induced in a Team from the knowledge that there is an enemy Spy wandering around is worth playing a Spy for in itself. It takes a couple of seconds to disguise yourself, so try not to be discovered.
Think before you disguise.
The Spy is the thinker's class. You need to outwit your enemy. After your first couple of infiltrations, it's fairly likely the enemy is on the lookout for you. They'll be watching for anyone on their team who's doing anything out of the ordinary. You need to watch the enemy so you can become one of them. Pick your disguise carefully, and change it whenever you're alone and the disguise is no longer fitting. If the enemy has one Sniper, and he's defending the base entrance, don't disguise yourself as a Sniper and walk into their Flag room.
Think before you shoot.
As a Spy, attacking anyone is not a decision to be made lightly. This is because when you attack, you lose your disguise. That's right. You're back to looking like a Spy, and you can be sure that any enemies who see you won't be amused that you've been pretending to be their buddy for the past 2 minutes. The only exception to this rule is the knife Your Eternal Reward, as it disguises you as the person you backstabbed, but you cannot normally disguise.
Be careful when picking up Flags.
Some maps have objects that remove your disguise. For example, in Capture The Flag maps, if you grab the enemy Flag while you're disguised, your disguise will be lost, and you won't be able to re-disguise while carrying it.
Knife them in the back.
When used right, your knife is the most lethal weapon you carry. If you stab an enemy in the back with it, it'll kill them in one hit. Bear in mind that as a result you'll lose your disguise, and you can be sure that if there are enemies around to notice this, they won't be amused.
Out of sight, out of mind.
If you're about to kill a victim on the enemy team, and they find you trying to kill them, it's best to use your cloaking abilty to flee, and if they think you're going to come back and take the kill, it will be a very easy to escape with the "Cloak and Dagger" or the "Dead Ringer".
Stair stabbing is one of the hardest tricks to master. To peform a stair stab you must be on a ramp or a flight of stairs. Make sure you currently have no disguise and an enemy is chasing you. When an enemy is coming up the stairs you have a height advantage which allows you to jump higher than normal. When you are airborne make sure you are facing the enemy (who is coming up the stairs) then when you sail over him, quickly turn around and while in mid-air backstab his exposed back.
Drop stabbing is inspired by the traditional assination method of the best selling franchise: 'Assasin's Creed'. To peform a drop stab you must be on an elevated platform of some kind, overlooking your target. When an enemy is moving under the player's elevated platform Eg. A bridge, you have to jump off the bridge and quickly drop down either behind him or on top of him. If you land ontop of him, quickly crouch and then your knife will go up, backstabbing the enemy. If you land behind him run forward and stab him. Tip: Make sure you are cloaked while standing on the elevated platform, otherwise people will see you.