Update: Heavy - Weapons

Now that all three have been revealed, I've been able to delete the individual posts and combine them into one comprehensive guide on the Heavy's three new weapons. Descriptions and photos were taken from Valve's blog.

1. The Sandvich (He'll satisfy your hunger - for revenge!)

The Sandvich is the Heavy’s first unlockable. It tastes as good as it looks and heals 120 health. Like in real life, the decision to eat a Sandvich must not be taken lightly; The Heavy is completely vulnerable during the four second eating process, and his loud, happy sounds of vigorous chewing will draw enemies like tiny ant cowards to a picnic. OF DEATH. On the bright side, the Heavy’s Sandvich supply is unlimited, so his only real concern is being caught short while enjoying this delicious edible device. The Sandvich is a great tool for a Heavy defending an area, as it gives him the ability to replenish health between enemy waves without having to abandon his post. Similarly, an offensive Heavy without a Medic can step back from the front line and grab a quick snack before resuming his rampage. Beware, however: the Heavy must set aside his shotgun to take the Sandvich, and enemy Snipers are much more dangerous for a Heavy wielding only a minigun. "Meet The Sandvich" video can be seen here.


2. Natascha (Now Sasha - don't be jealous)

The Heavy's second unlockable, Natascha, slows enemies with her bullets. Anyone damaged by her will move slower for an instant, encouraging them to find cover or turn and face the Heavy, mano-a-tiny-itty-bitty-mano. Unfortunately, Natascha is slightly weaker than Sasha, so she takes longer to finish off a victim. As a result, Natascha's great against fleeing cowards, such as Scouts & Medics, and less great against anyone actively trying to kill her master. Heavies that like to jump around corners and surprise groups of startled enemy crybabies will also find her very useful, although they should look for a Sasha-wielding enemy Heavy before they leap.


3. The Killing Gloves Of Boxing (In this corner - the defending Russian heavyweight)

The unlockable for the Heaviest pugilists out there is the K.G.B. Any time a Heavy kills an enemy with the K.G.B he receives five seconds of guaranteed critical hits. This crit-boost can be used to punch and kill further enemies, extending the boost time. Alternatively, the Heavy can switch to another weapon and use the boost to take out an enemy at range. The Heavy's slow movement speed, and the K.G.B's slower swing speed, make it a risky prospect.

Heavy Achievements Revealed

Wondering what the achievements would be? See all 35 listed below, or check out Valve's blog.

Iron Kurtain: Take 1000 points of damage in a single life.

Party Loyalty: Kill 50 enemies within 3 seconds of them attacking your Medic.

Division of Labor: Kill 20 enemies with a Medic assisting you, where neither of you di

Red Oktoberfest: Earn a domination for a Medic who's healing you.

Show Trial: Kill an enemy with a taunt.

Crime and Punishment: Kill 10 enemies carrying your intelligence.

Class Struggle: Work with a friendly Medic to kill an enemy Heavy & Medic pair.

Soviet Block : While invulnerable and on defense, block an invulnerable enemy Heavy's movement.

Stalin the Kart: Block the enemy from moving the payload cart 25 times.

Supreme Soviet: Get ubered 50 times.

Factory Worker: Kill 20 enemies while being recharged by a dispenser.

Soviet Union: Get 25 enemy kills where you either assist or are assisted by another Heavy.

Own the Means of Production: Remove 20 stickybombs by killing the Demomen who produced them

Krazy Ivan: Kill 100 enemies while both you and your victim are underwater.

Rasputin: In a single life, get shot, burned, bludgeoned, and receive explosive damage.

Icing on the Cake: Get 20 kills on players that you're dominating.

Crock Block: Survive a direct hit from a critical rocket.

Kollectivization: Get 1000 assists.

Spyalectical Materialism: Kill or assist in killing 10 cloaked spies.

Permanent Revolution: Kill 5 enemies without spinning down your gun

Heavy Industry: Fire $200,000 worth of minigun rounds in a single life.

Communist Mani-Fisto: Kill an enemy with a critical punch.

Redistribution of Health: Heal 1000 damage with med-kits in a single life.

Rationing: Kill an enemy with your shotgun while you're out of minigun ammo.

Vanguard Party: Be the first on your team to start capturing a control point in a round.

Pushkin the Kart: Get 50 caps on payload maps.

Marxman: Kill 10 enemies in mid-air with the minigun.

Gorky Parked: Kill 25 enemies while you're standing on a control point you own.

Purge: Kill 15 enemies capturing a control point you own.

Lenin A Hand: Help 5 teammates get revenge on their nemeses.

Five Second Plan: Kill an enemy in the first 5 seconds after you exit a teleporter.

Photostroika: Provide an enemy with a freezecam shot of you taunting while invulnerable.

Konspicuous Konsumption: Eat 100 sandviches.

Don't Touch Sandvich: Kill 50 scouts using Natascha.

Borscht Belt: Kill 10 heavies with The K.G.B.

New Map: CP_STEEL

A complex Attack/Defense control point map, with some unique gameplay. Unlike most TF2 maps, capturing a control point modifies the layout of the map, opening and closing routes for each team. As a result, the offensive team has a wide variety of tactical choices around how they'd like to assault the final point. Should they use Scouts and Soldiers to rush the final point with only the routes they start with? Should they go for the side control points and open up more routes to the final? Should they capture extra points to shut down the defender's routes? The many choices keep the map interesting for a long time, providing a wide variety of experiences in a game.
Description taken from Valve's blog, sounds like an interesting twist.