Rebirth

Rebirth is the thirteenth level in Call of Duty: Black Ops.

After the death of Kravchenko, Alex Mason and Viktor Reznov seek out Freidrich Steiner at Rebirth Island with the intention of killing him. After fighting their way through the whole defenses Viktor Reznov declares his name and then executes Fredrich Steiner with his Makarov right before the glass behind them is shattered by two Hazmat suit-wearing soldiers.

Then the game flashes back 20 minutes earlier when the CIA assaults Rebirth Island. Hudson and Weaver are moving through the Russian compound in two BTRs, accompanied by a platoon of US soldiers. Hudson and Weaver fight their way through until Hudson's BTR is destroyed by a helicopter. Nova 6 is then released by the helicopter, forcing Hudson and the soldiers to put on gas masks.

After fighting his way to a clean air environment, Hudson attempts to contact Mason, but Mason fails to respond. At the same time Weaver contacts Steiner, who tells Weaver that all non-essential personnel are being executed by Dragovich's soldiers. When Hudson and Weaver get to the room were Steiner is located, both of them see Mason yelling that he is Viktor Reznov. Attempting to stop Steiner's execution, Hudson and Weaver, still in their hazmat suits, smash the window with a crate and seize Mason's gun, but not before Steiner is killed.

== Walkthrough==

Mason
The player starts off in a cargo container with Reznov, who is disguised as a Russian military officer (presumably along with Mason). After some time you exit and take out a lone guard with his own Tomahawk. You must then stick to the shadows while following Reznov through the compound. After the guards begin evacuating, you must take out two more guards until you are on the roof with better weapons. You then enter the facility and slaughter Russian troops, going through testing labs for animals and humans. You eventually find Steiner and Reznov takes his revenge.

Hudson
After a short cutscene with the Interrogator, the player takes control of Jason Hudson. You will begin on a BTR-60 APC with a turret gun and grenade launcher. You continue to storm the island until your APC gets destroyed by a helicopter that drops Nova 6 onto your squad. The player quickly equips a Gas Mask and continues infiltrating on foot with an Enfield with Infrared Scope. During this part of the mission, the player can take damage (Cracks will appear on the "mask") and it will not regenerate. If too much damage is taken, Hudson's suit will break open and the player will die due to exposure to the Nova-6 gas. Once the player reaches the facility, Hudson removes his gas mask and is no longer in danger of coming in contact with Nova gas. Once inside the facility, there will be very little opposition, as Mason has already killed most of the enemies. You will walk through the same rooms as you did as Mason, killing any survivors along the way. The player will then find himself on the opposite side of the window where Mason is about to kill Steiner. Hudson and Weaver manage to break through the window but are unable to prevent Mason from killing Steiner. Hudson knocks Mason unconscious, by pistol-whipping him in the head, then prepares to take his body to the interrogation room. Weaver questions Reznov's whereabouts but Hudson explains that Reznov never existed and was just a figment of Mason's imagination. It should be noted when you see Reznov and Mason they are wearing the same outfit as they execute Steiner.

Trivia

 * This is the second level where the player controls more than one character within the same level in Black Ops, and the third time in Call of Duty series. The first time was "Second Sun" in Modern Warfare 2, and the second time was "WMD" in this game.
 * This is also the first time in the Call of Duty series where both playable characters come in direct contact (For example; Hudson knocking out Mason).
 * Strangely enough the first time you run out of ammo with shooting all the bullets on the AK74u you will not have to reload,as it will act as another mag is in there and the whole gun ammo returns to 30/270.
 * Rebirth Island, or Vozrozhdeniya, is a real location, and indeed the Soviets did establish bio-weapon facility there in 1948, and it was a major R&D facility for the USSR Microbiological Warfare Group until the dissolve of the USSR. The facility, in fact the entire island, were abandoned by its staff in 1992. Weaponized anthrax was mass produced and stockpiled back in the days. When it was abandoned, stockpiles of weaponized anthrax weren't properly destroyed or stored, and leakage developed over the years.
 * While it still exists on maps, Rebirth is no longer geographically an island by the year 2001 due to continual shrinkage of Aral Sea.
 * In real life, the town Kantubek, and the Aralsk Biological Weapons Laboratory were about 2.5km apart, and the terrain on the island was largely flat, so the town and facility that the mission took place in are at best based on the backdrop of real locations.
 * In the beginning of the mission when the player is taking out the second soldier, if the player does not stand close enough for the animation to play, he may end up killing the soldier silently but still alert the enemies.
 * If the player alerted the enemies during the starting dock area, the enemies will only attack the player and leave Reznov alone, and Reznov will just stand there without respond to the attack, giving a hint that he never exists.
 * During Hudson's assault, it is possible to see a soldier named "Pvt. Lamia". Mark Lamia is Treyarch's Studio Chief.
 * If the player shoots the device hanging from the top of the chamber in the room that leads to the room that Steiner is in, the doors will close and release Nova 6 gas, which kills the monkeys in it and anyone unfortunate enough to be in the chamber. (This includes the player, and since this rule applies to the enemy as well' it is strongly recommended that the player stays clear of the chamber.)
 * At the start of the level, if you keep on clicking the switch weapons button, the icon will instead show "hands"
 * Many people at first thought there was going to be zombies in the campaign because of the name of this level.
 * On this mission Reznov is wearing the exact same clothes as Dragovich's 2nd in command Lev Kravchenko.