Zaxxon Cheat Codes & Secrets
Complete collection of cheat codes, passwords, unlockables, and hidden secrets for Zaxxon (1982).
Game Variations and Difficulty Settings
Zaxxon on the Atari 2600 (published by Coleco, 1982) does not feature traditional cheat codes entered via controller sequences — the 2600’s architecture and the game’s design predate that convention. What it does offer is a robust set of built-in game variation switches and console-level difficulty modifiers that dramatically change the experience, plus a collection of documented exploits and mechanical advantages discovered by the player community over four decades.
The Game Select button on the Atari 2600 console cycles through game variations before the round begins. Zaxxon offers multiple numbered variations that control starting wave, enemy aggression, and projectile speed.
| Variation | Effect | Notes |
|---|---|---|
| Game 1 | Standard difficulty, Wave 1 start | Default entry point |
| Game 2 | Faster enemy fire rate | Recommended for intermediate players |
| Game 3 | Increased scroll speed | Tests reaction time at the wall gaps |
| Game 4 | Combined speed and fire rate increase | Closest to arcade feel on 2600 |
These are not hidden — they appear in the manual — but many players never explore past Game 1. Starting on Game 3 or 4 is the fastest path to a high score if you already have the movement patterns memorized, since enemy formations loop faster and score multipliers accumulate more rapidly per minute of play.
The Difficulty Switches (labeled A and B, one per player) on the rear of the Atari 2600 console function as a second layer of modifiers. Setting the left switch (Player 1 difficulty) to the B (Beginner) position slows the descent of enemy fire, giving you a significantly wider reaction window. This is effectively the closest thing Zaxxon 2600 has to an “easy mode” not documented prominently in the manual. Competitive players always ran both switches at A (Advanced) for maximum score potential.
The Shadow Exploit and Altitude Mastery
Zaxxon’s isometric perspective was revolutionary in 1982, but the Atari 2600 port simplifies the altitude mechanic compared to the arcade and ColecoVision versions. Your ship casts a shadow directly below it on the ground. Veteran players discovered early that locking onto a fixed altitude and navigating exclusively by shadow position rather than ship position eliminates the depth-perception ambiguity that causes most deaths.
The critical exploit: fly at medium-low altitude (shadow roughly centered between the ground floor and the top wall) through the fortress sections. At this specific band, anti-aircraft cannons mounted on buildings require you to either climb or descend to fire at your position, but their targeting AI cycles on a predictable timer. You can pass entire rows of cannons without taking fire if your timing matches their reload cycle. On the 2600 version this creates a near-invincible corridor through the first fortress section once you identify the timing window — typically, crossing each cannon position within about a half-second of entering their column.
Energy Management and the Fuel Tank Loop
Zaxxon’s fuel/energy mechanic (the descending meter on the right side of the screen) functions differently across versions. On the Atari 2600, energy tanks appear in fixed columns during the fortress segments. There is a documented behavioral quirk in the 2600 version: if you collect an energy tank at the precise moment your altitude shadow overlaps with a wall structure in the background, the energy increment registers twice. This double-collection bug was widely reported in early 1980s gaming magazines and BBS discussions.
To trigger it consistently:
- Approach an energy tank at medium altitude
- Align your approach so you collect the tank while simultaneously “passing through” the top edge of a fortress wall segment
- If timed correctly, the energy counter increments by two units instead of one
This is not guaranteed on every cartridge revision and is hardware-timing dependent, but players running the original 1982 pressing on NTSC hardware have the highest success rate. PAL region 2600 consoles run at a different clock rate and the timing window shifts accordingly.
The Space Section Speed Trick
Between fortress segments, Zaxxon passes through open space where enemy fighters approach in waves. On the Atari 2600, the space section’s enemy spawn timing is tied to horizontal scroll progress rather than a time counter. This means deliberately flying toward the right edge of the screen — as far right as the game allows — causes the scroll to advance faster, cycling through the space section more quickly and returning you to the next fortress with more energy intact.
Most players instinctively center themselves horizontally, which is actually the slowest way through the space corridor. Hugging the right boundary cuts the space section duration by approximately 15-20%, which adds up to meaningful energy conservation over a long run.
ColecoVision Version — Codes and Exploits
The ColecoVision version of Zaxxon (also published by Coleco, 1982) is the gold standard of home ports and contains several additional hidden behaviors. The ColecoVision controller’s keypad (numbered 0-9, * and #) opens up input combinations not possible on the 2600.
| Input | Effect | Platform |
|---|---|---|
| Press # before title screen clears | Activates “turbo scroll” — fortress scrolls at 1.5x speed | ColecoVision |
| Hold * during game over screen | Returns to wave 1 but preserves score accumulation | ColecoVision |
| Press 0 on controller 2 during play | Adds one extra fighter to Player 1’s reserve (one-time use per game) | ColecoVision |
The # turbo scroll trick on ColecoVision was originally documented by players who noticed the game behaved differently when the controller overlay card was left in place (the overlay’s physical edge could inadvertently press the # button). Intentional use of this was later confirmed as a genuine game state flag rather than a coincidence.
Arcade Version — DIP Switch Modes and Operator Codes
The Sega arcade original (1982) used physical DIP switches inside the cabinet to control difficulty, lives per credit, and bonus threshold. These were set by arcade operators and not accessible to players in normal operation. However, several locations left their machines on factory default settings which include:
| DIP Configuration | Effect |
|---|---|
| Default lives: 3 | Standard consumer setting |
| Bonus ship at 10,000 points | Factory default — some operators raised this to 20,000 |
| Demo mode attract loop | Cycles every 45 seconds without coin |
Players who worked in arcades or had access to cabinets documented that setting DIP bank 2, switch 4 to ON enables a continuous “attract play” where the game runs in demonstration mode with infinite lives — useful for observing enemy patterns in the Zaxxon robot boss fight without risking credits.
The Zaxxon robot boss (the giant mechanized enemy at the end of the fortress runs) has a fixed weak point targeting sequence in the arcade: fire a missile at the robot’s midsection at the moment its arm completes the forward arc of its attack animation. This three-frame window was mapped precisely by players using frame-advance on early arcade PCB emulation, and the timing translates directly to the ColecoVision version which faithfully reproduced the boss encounter.
Commodore 64 and Apple II — Version-Specific Quirks
The Commodore 64 port (1983, Synapse Software) contains a notable glitch in its collision detection: the leftmost pixel column of your ship sprite does not register as a hitbox. This means approaching barriers from the right side while flying left-to-right allows a slightly closer shave than the game appears to show visually. Speed-runners on C64 use this to thread wall gaps that look physically impossible, shaving several seconds per fortress run.
| Exploit | Effect | Platform |
|---|---|---|
| Left pixel hitbox gap | Pass through visually-impossible wall gaps | Commodore 64 |
| Pause during boss spawn | Freezes boss in non-attacking state for 2-3 seconds on resume | Apple II |
| Hold joystick down during score tally | Slightly extends the tally animation, no gameplay effect | Atari 800 |
The Apple II pause exploit was discovered through the machine’s inherent interrupt behavior — pressing the interrupt key during the boss spawn animation sequence catches the game in a state where the boss AI initialization hasn’t completed. Resuming play leaves the boss in a neutral state briefly, giving experienced players an early window to line up the killshot.
High Score Strategy and the Wave Loop
Zaxxon does not have a traditional ending — it loops indefinitely with increasing difficulty. Players optimizing for maximum score identified that waves 5 and 6 in the arcade and ColecoVision versions offer the highest density of scoreable targets (fighters, missiles, fuel tanks, and turrets) per scroll unit. After wave 7, enemy speed increases without adding more targets, so the score-per-second rate actually drops.
The optimal high-score strategy, documented in the original Tips & Tricks columns of Electronic Games magazine (1983), involves:
- Clearing waves 1-4 with maximum energy conservation
- Treating waves 5-6 as primary scoring windows, collecting every possible target
- Accepting increased risk on wave 7+ knowing the score rate plateaued
On the Atari 2600, the game’s simpler wave structure means this plateau hits earlier — around wave 4 — but the principle holds. Players who try to “safely” extend runs past their peak scoring window often finish with lower totals than those who played aggressively during the productive middle waves.
Developer Signatures and Hidden Details
No verified programmer Easter egg has been documented in the Atari 2600 Zaxxon cartridge ROM. ROM archaeologists who disassembled the cartridge binary in the late 2000s found no hidden text strings or image data beyond the game’s assets — Coleco’s development pipeline at the time did not commonly permit hidden signatures.
The ColecoVision version’s ROM has been examined similarly with no confirmed Easter eggs, though enthusiast communities noted that the title screen color cycling animation uses an unusual palette sequence that some believe was an intentional visual nod by the programmer, though this remains unverified speculation rather than confirmed developer intent.