Ascension stands as a pivotal moment in the history of Call of Duty Zombies. Originally released in 2011 as part of the First Strike DLC for Black Ops, and later remastered in the Zombies Chronicles map pack for Black Ops III, this map fundamentally changed how fans perceived the mode. It moved away from the claustrophobic hallways of Verruckt and the relatively straightforward nature of Kino der Toten, introducing a sprawling, multi-layered Soviet spaceport that offered both immense freedom and unique challenges.

The map is set in a desolate Soviet Cosmodrome, a facility once at the heart of the space race, now overrun by the undead. Understanding the intricacies of this map is essential for anyone looking to reach high rounds or complete the legendary Casimir Mechanism.

The Atmospheric Shift from Black and White to Color

One of the most striking features of Ascension is its initial visual presentation. When a match begins, the entire environment is rendered in a grainy, noir-style black and white. This is not merely a stylistic choice; it serves as a narrative and mechanical cue. The lack of color represents the facility's dormant state.

To restore color and "activate" the map, players must navigate through the facility to find the power switch. Located at the top of the main building near the roof, flipping this switch triggers a sequence that restores full color to the world. More importantly, turning on the power activates the Perk-a-Cola machines, the electric traps, and the automated turrets. It also initiates the launch sequence for the map's central rocket, which is a prerequisite for accessing the Pack-a-Punch machine.

In a cooperative game, the most efficient route to the power typically involves opening the first door in the centrifuge room (starting area), moving toward the stairs, and progressing through the upper laboratory floors. Speed is of the essence, as fighting in black and white can make it difficult to spot zombies against the grey environments, especially for newer players.

Key Gameplay Mechanics and Transport Systems

Ascension introduced the Lunar Lander system, a revolutionary transport mechanic that allowed players to traverse the large map quickly. There are three landing pads scattered across the Cosmodrome: one near the PhD Flopper area, one near the Speed Cola room, and one in the Stamin-Up corridor.

How to Use the Lunar Landers

The Lunar Landers act as a ferry service back to the central hub. Each ride costs 250 points. To use them effectively, one player must stay with the lander while another calls it from a different station.

  • Refuel Time: After a lander arrives at a pad, it requires a short cooldown before it can be used again.
  • Lander Hazards: Players must be cautious not to stand directly under a landing pad when a lander is arriving, as this results in an instant down.
  • Tactical Use: During high rounds, the lander can be a lifesaver. If a player is cornered near a landing pad, jumping on the lander provides a safe, invincible flight path back to the centrifuge room, buying time to regroup or reload.

Unlocking the Pack-a-Punch Machine

The process for unlocking the Pack-a-Punch on Ascension is more interactive than its predecessors. After the power is turned on, players must ride all three Lunar Landers from their respective stations back to the centrifuge room. Once all three have been used, a control panel next to the power switch becomes active. Interacting with this panel launches the massive Soyuz rocket.

Observing the rocket launch is a spectacle, but the real reward lies beneath it. After the rocket clears the area, the doors to the launch pad's basement open, revealing the Pack-a-Punch machine. A pro tip for extra points: shooting the rocket with high-damage weapons (like the Ray Gun or RPG) during its ascent can cause it to explode, dropping a Double Points power-up.

Mastering the Space Monkey Rounds

Ascension replaced the traditional Hellhounds with a much more frustrating enemy: the Space Monkeys. These monkeys do not just attack players; they target your perks.

Defending Your Perk Machines

The Monkey Round occurs every few rounds once the power is on and at least one player has purchased a perk. These small, agile creatures will ignore players and head straight for the Perk-a-Cola machines. If they reach a machine and begin clawing at it, players will notice their perk icons flickering on the HUD. If the machine takes enough damage, that perk is removed from all players who owned it.

To successfully defend against them:

  • Coordinate Positions: In a four-player game, each player should guard a specific perk machine. The most vital machines to protect are Juggernog and Speed Cola.
  • Use the Right Tools: Explosives and tactical grenades like the Claymores or the Matryoshka Dolls are effective against groups of monkeys. However, be careful—monkeys have a unique AI that allows them to pick up and throw back frag grenades.
  • The Reward: If the team kills all monkeys without any perk machine being touched, a Max Ammo and a Free Random Perk are awarded. If a machine was touched but no perks were lost, only a Max Ammo is given.

New Perks and Essential Wonder Weapons

Ascension was the debut map for two of the most beloved perks in the franchise: Stamin-Up and PhD Flopper.

Stamin-Up and PhD Flopper

  • Stamin-Up (2000 Points): This perk increases your sprint speed and duration. On a map as large as Ascension, Stamin-Up is crucial for "training" zombies—the act of leading them in a tight pack while staying just out of reach.
  • PhD Flopper (2000 Points): This perk provides immunity to fall damage and explosive damage. Its signature move is the "Nuke Dive." By dolphin-diving from a sufficient height, the player creates an explosion upon impact, killing nearby zombies. This makes weapons like the Ray Gun or Mustang and Sally much safer to use at close range. Note that in the Black Ops III Chronicles version, PhD Flopper was replaced by Widow's Wine, which fundamentally changed the defensive meta of the map.

The Wonder Weapon Arsenal

Two specific Wonder Weapons define the Ascension experience: the Thundergun and the Gersh Device.

  1. The Thundergun: Known as the "Zeus Cannon" when upgraded, this weapon blasts a gust of compressed air that instantly kills any zombie in its path. It is the ultimate get-out-of-jail-free card.
  2. The Gersh Device: This is a tactical grenade that creates a localized black hole. It sucks in all nearby zombies for several seconds, providing a window for players to revive teammates, buy perks, or simply catch their breath. In the lore, this device was created by Dr. Anton Gersh, who players must eventually rescue.
  3. Matryoshka Dolls: These Russian nesting dolls serve as a powerful cluster grenade. While they lack the utility of the Gersh Device, they are excellent for clearing paths or defending perk machines during monkey rounds.

Step-by-Step Guide to the Casimir Mechanism Easter Egg

Ascension features the first truly complex "Main Quest" in Zombies history, requiring four players to complete. The objective is to free Dr. Anton Gersh from the Casimir Mechanism.

Step 1: The Gersch Device and the Generator

After turning on the power and obtaining the Gersh Device from the Mystery Box, head to the area near the MP5K wall-buy. Outside the map boundaries, there is a small, sparking generator. Throw a Gersh Device so that the black hole pulls the generator into the void. Once successful, Dr. Gersh will speak to the players, and a computer screen in the Stamin-Up room will display a new icon.

Step 2: The Synchronized Buttons

This step must be performed during a Space Monkey round. Four buttons will appear on the walls near the Juggernog, Speed Cola, Stamin-Up, and PhD Flopper machines. All four players must stand in front of these buttons and press the "interact" button simultaneously. If timed correctly, the buttons will stay depressed, and a chime will play.

Step 3: The Pressure Plate and the Clock

All four players must travel to the area under the rocket (where the Pack-a-Punch is located). There is a large metal pressure plate on the ground in front of a clock on the wall. All players must stand on this plate for two full minutes. If any player steps off, the timer resets. During this time, zombies will not spawn, but the tension remains high. At the end of the two minutes, a nuke will detonate, signaling the completion of the step.

Step 4: Spelling L-U-N-A

This step requires precise coordination with the Lunar Landers. Players must call the landers in a specific sequence to collect floating letters in the sky:

  • L: Ride from the spawn room to the Stamin-Up station.
  • U: Ride from Stamin-Up back to the spawn room.
  • N: Ride from the spawn room to the Speed Cola station.
  • A: Ride from Speed Cola back to the Stamin-Up station. Once "LUNA" is spelled, the Casimir Mechanism is nearly ready.

Step 5: The Final Sacrifice

Head to the area near the Casimir Mechanism (the pod near the Stamin-Up room). A glowing white orb will appear. Throw a Gersh Device at the orb. While the black hole is active, all four players must unload their most powerful Pack-a-Punched weapons—specifically the Zeus Cannon (Thundergun) and the Ray Gun—into the orb. The massive influx of energy will free Dr. Gersh.

The reward for completing this quest is a 90-second Death Machine for all players and, in the Black Ops III version, all players receive all eight perks permanently for the remainder of the game.

Best High-Round Survival Strategies

Reaching Round 50+ on Ascension is highly achievable because the map offers some of the best training spots in the entire series.

The Lunar Lander Strategy (PhD Flopper Area)

This is widely considered the safest strategy. One player stays in the large open area where the PhD Flopper (or Widow's Wine) lander pad is located. Because the area is vast and has few obstacles, you can easily lead zombies in a circle. If you get overwhelmed, the Lunar Lander is right there to take you to safety.

The Spawn Room Strategy

The centrifuge room where you start is also a viable training spot. By keeping the door to the stairs closed and only opening the door to the power room, you can force zombies to spawn from specific windows. This requires high situational awareness due to the rotating centrifuge in the center, which can down a player if they are hit by the arm while their health is low.

The Pack-a-Punch "Alley"

For more aggressive players, the area near the Pack-a-Punch provides a long straightaway. Using the Thundergun to clear the lane and the Gersh Device to create breathing room allows for very fast round progression, though it is riskier than the Lunar Lander training spot.

Comparison Between Black Ops 1 and Zombies Chronicles Versions

While the layout remains identical, the gameplay experience between the 2011 original and the 2017 remaster is distinct.

  • Visual Fidelity: The Chronicles version features stunning lighting and textures, making the transition from black and white to color much more impactful.
  • Gobblegums: The inclusion of Gobblegums in Black Ops III makes Ascension significantly easier. Using "Perkaholic" or "Shopping Free" in the early rounds can set a team up for success within minutes.
  • Weaponry: The BO1 version features classic Cold War-era weapons like the Galil and Commando, whereas the BO3 version uses the futuristic arsenal of the third game. The lack of PhD Flopper in the BO3 version is the most significant mechanical change, as it removes the "Mustang and Sally" explosive strategy that many veterans relied on.

Summary

Ascension remains a masterpiece of map design. It successfully balanced the introduction of complex Easter Eggs with a gameplay loop that is accessible to casual players. Whether you are navigating the Lunar Landers, defending your perks from thieving monkeys, or attempting the Casimir Mechanism, Ascension provides a deep and rewarding experience. Its blend of Soviet industrial aesthetics and supernatural horror cemented its place as a fan-favorite that continues to be played a decade after its release.

FAQ

What is the best weapon for the Space Monkeys on Ascension? The Thundergun and Ray Gun are highly effective, but the best way to deal with monkeys is using the Sickle (melee weapon) for early rounds or Claymores placed directly in front of the perk machines. In Black Ops III, the Dead Wire or Blast Furnace ammo types are also excellent.

Can you complete the Ascension Easter Egg solo? No. The Casimir Mechanism requires four players because several steps, including the synchronized buttons and the pressure plate, are hard-coded to detect four individual players.

How do I get the free perk on Ascension? You must kill all the Space Monkeys during a monkey round without any of them ever touching a Perk-a-Cola machine. If a monkey even swipes at a machine once, you will only receive a Max Ammo instead of the free perk.

Where is the power switch on Ascension? From the spawn room, open the door to the laboratory, go up the stairs, continue through the next set of doors until you reach the roof of the main facility. The power switch is located there, identified by a lightning bolt icon.

What happened to PhD Flopper in the Black Ops III version? Due to the removal of the dolphin-dive mechanic in Black Ops III (replaced by sliding), PhD Flopper was removed from the Chronicles remaster of Ascension and replaced with Widow's Wine. This makes players vulnerable to their own explosive damage again.

How many Lunar Landers are there? There are three Lunar Landers in total. They are located near the Speed Cola machine, the Stamin-Up machine, and the PhD Flopper/Widow's Wine machine.

What is the "Sickle" and where is it located? The Sickle is a melee weapon that replaces your knife, similar to the Bowie Knife. It is a one-hit kill until round 14. It can be found in the room near the Speed Cola Lunar Lander station for 3000 points.