Version 1.0 Released

ARC VAULT 1.0 IS HERE

After many iterations, balancing passes, boss reworks, gameplay experiments and a rather unreasonable number of Game Boy test builds, ARC VAULT 1.0 is finished.

What started as a small block-breaking prototype gradually turned into a full Game Boy arcade campaign with bosses, enemies, power-ups, secret content and its own progression systems.

And most importantly:

ARC VAULT is a real Game Boy ROM.

Not a modern game with a green filter.

Not a browser game pretending to be a handheld title.

The final game is a 32 KB ROM designed around the limitations of the original hardware.

FROM SIMPLE BLOCK BREAKER TO ARC VAULT

The earliest version was intentionally small.

A paddle.

A ball.

A few stages.

Basic collision detection.

From there, the game grew one system at a time.

The challenge was not simply adding more content.

Every new mechanic had to coexist with the Game Boy’s limited CPU time, sprite budget, VRAM access rules and memory constraints.

That meant designing systems carefully instead of throwing unlimited objects onto the screen.

The final version now contains a complete campaign with:

• 16 stages
• four boss battles
• enemy drones
• Elite Guards
• bonus stages
• a secret Hidden Sector
• moving hazards
• Phase Blocks
• Bomb Blocks
• armored blocks
• Vault Keys
• Continue Codes
• multiple power-ups
• Multiball
• Laser Paddle
• Pulse Barrier
• combo scoring
• multiple boss phases
• intro and ending sequences

POWER-UPS

One of the biggest changes during development was expanding the power-up system.

The final game includes:

Wide Paddle

Temporarily increases the paddle width.

Slow Orb

Reduces ball speed and makes difficult situations easier to control.

Multiball

Creates additional balls, allowing up to three active balls at once.

Laser Paddle

Lets the paddle fire directly into blocks and enemies.

Extra Life

Exactly what it says on the cartridge label.

Pulse Charge

Refills the energy required for the defensive Pulse Barrier.

Repeated power-ups are not automatically wasted.

Many of them extend their current duration or provide alternative bonuses if their main effect is already active.

THE PULSE BARRIER

The Pulse Barrier became one of ARC VAULT’s defining mechanics.

Collect enough Pulse energy and press B to temporarily protect the lower edge of the arena.

It can rescue a ball that would otherwise be lost.

But Pulse energy is limited.

Using the barrier too early can leave you defenseless when you actually need it.

ENEMIES ENTER THE ARENA

Traditional block-breaking games usually let the ball and level geometry provide all the danger.

ARC VAULT eventually moved beyond that.

Later stages introduce active enemies.

Scout Drones

Fast-moving targets that add pressure to the arena.

Hunter Drones

More aggressive enemies that track the player more closely.

Elite Guards

Mini-boss-style enemies with multiple hit points.

They can move independently and fire projectiles directly toward the player.

The Hidden Sector contains an even stronger Elite Guard.

PHASE BLOCKS

Phase Blocks were added late in development because the later stages needed something beyond simply adding more durable bricks.

These blocks alternate between vulnerable and protected states.

The player has to wait for the correct window to destroy them.

Bomb explosions can bypass their normal protection, creating another reason to think about how different systems interact.

THE BOSSES

ARC VAULT contains four major boss battles.

ARC WARDEN

The first major Guardian.

A relatively readable introduction to boss movement and projectile attacks.

CORE SENTINEL

A stronger system guardian with faster patterns and more aggressive phases.

SENTINEL PRIME

A more dangerous Sentinel variant with substantially increased pressure.

VAULT EYE

The final boss.

VAULT EYE has its own sprite set, multiple movement phases and increasingly aggressive attacks as its health decreases.

One major polishing pass before release focused entirely on boss fairness.

Bosses now visibly telegraph attacks before firing.

The boss briefly flashes and pauses its movement, giving the player a chance to react before projectiles enter the arena.

THE HIDDEN SECTOR

There is also a secret route.

Certain Core Blocks can contain Vault Keys.

Collect enough of them before reaching the final area and the normal route changes.

Instead of immediately progressing toward the final boss, the player enters the:

HIDDEN SECTOR

This optional stage contains additional hazards and a stronger Elite Guard.

Players who complete it receive a different acknowledgement during the ending.

CONTINUE CODES

ARC VAULT does not use battery-backed cartridge RAM.

Instead, it uses an old-school password system.

After completing sections of the game, a Continue Code is displayed.

The code remains on screen until the player confirms that they have recorded it.

From the title screen, SELECT opens the Continue Code input screen.

Enter the correct four-digit code and you can return to that part of the campaign.

No battery required.

FIXING THE WEIRD BUGS

The final development stages focused less on features and more on strange edge cases.

One particularly interesting bug involved Multiball and enemy projectiles.

Originally, enemy projectiles shared part of the same logic used when a ball was lost.

That meant a projectile hitting the player during Multiball could sometimes remove only one active ball instead of costing a life.

In other words:

Multiball accidentally became armor.

That was definitely not intentional.

The logic was separated before release.

Enemy projectiles now correctly damage the player, remove one life and reset the active ball state.

A dedicated regression test was created specifically to make sure that bug cannot silently return.

RELEASE QA

For the final build, testing went significantly beyond simply starting Stage 1 and checking that the game did not crash.

Each of the 16 stages was booted individually in a Game Boy emulator.

That included:

• standard stages
• both bonus stages
• Drone stages
• Elite Guard stages
• Phase Block stages
• Hidden Sector
• ARC WARDEN
• CORE SENTINEL
• SENTINEL PRIME
• VAULT EYE

Additional testing included:

• DMG compatibility
• Game Boy Color compatibility mode
• Super Game Boy compatibility mode
• Continue Code tests
• boss attack tests
• Multiball regression tests
• ROM checksum verification
• stage data validation
• password uniqueness checks
• clean rebuild tests

The final release ZIP was also tested separately.

It was extracted into a fresh directory and rebuilt entirely from the included source code.

The resulting ROM was byte-identical to the release ROM.

That was an important final milestone.

TECHNICAL DETAILS

The final ARC VAULT cartridge image is:

32 KB

The game uses:

• fixed actor pools
• static stage data
• tile-based backgrounds
• Game Boy sprite hardware
• hardware sound channels
• no dynamic heap allocation during gameplay

The goal throughout development was to keep the runtime predictable.

On hardware this limited, predictability matters more than clever abstraction.

WHAT’S IN VERSION 1.0

ARC VAULT 1.0 includes:

• 16 stages
• four boss battles
• two Bonus Rush stages
• Hidden Sector
• Vault Keys
• Continue Codes
• Phase Blocks
• Bomb Blocks
• armored blocks
• moving hazards
• enemy Drones
• Elite Guards
• Multiball
• Laser Paddle
• Wide Paddle
• Slow Orb
• Extra Lives
• Pulse Charge
• Pulse Barrier
• combo system
• session high score
• original Game Boy graphics
• original sound effects
• multiple music patterns
• intro sequence
• complete ending

WHAT’S NEXT?

For now, ARC VAULT 1.0 is the finished release.

I do not want to immediately bury the game under another pile of systems just because version numbers exist.

The next priority is presentation:

• itch.io page
• screenshots
• cover artwork
• downloadable manual
• release materials

After that, future updates will depend on feedback and actual bugs found by players.

But the main campaign itself is complete.

Thank you for checking out ARC VAULT.

Enter the Vault.

Break the defenses.

Find the Hidden Sector.

And see if you can survive what waits at the core.