pH Bubble: Bio-Acid Hazard

pH BUBBLE: BIO-ACID HAZARD is a portrait-mode falling-bubble biochemical puzzle game. Connect colorful characters, control the pH inside the beaker, and purify a dangerously unstable experiment.

Meet the three main bubbles: red OXY, blue HYDRO, and purple NEUT. Connect four or more matching bubbles vertically or horizontally to burst them. Build chains, trigger chemical reactions, and clean up the contaminated chamber.

【THREE BUBBLES, THREE PERSONALITIES】

・OXY — Acidic / Red

An aggressive, fizzy bubble with the power to dissolve bone. Bursting OXY shifts the solution toward the acidic side.

・HYDRO — Basic / Blue

A slimy, sludge-like bubble that breaks down fat. Bursting HYDRO shifts the solution toward the alkaline side.

・NEUT — Neutral / Purple

The balancing bubble. Bursting NEUT moves the pH slightly back toward 7.0. Choosing when to clear it can change your entire strategy.

【PURIFY WASTE AT EXTREME pH】

BONE and FAT cannot be removed by ordinary bubble bursts.

Lower the pH to 3.0 or below, and every BONE deposit on the board dissolves in a burst of white foam. Raise the pH to 11.0 or above, and every FAT mass emulsifies into sludge and disappears.

After purification, the pH returns to 7.0—so you must decide which direction to push the next reaction.

【CHAINS AND OVERDRIVE REACTIONS】

When the solution becomes acidic, bursting OXY also consumes adjacent HYDRO bubbles. On the alkaline side, bursting HYDRO consumes adjacent OXY bubbles.

Longer chains create stronger pH changes, allowing you to trigger massive reactions and purify the board in one dramatic sequence.

【CHANGE THE SITUATION WITH REAGENT DROPPERS】

Tap the red or blue dropper to inject an acidic or alkaline reagent.

Use them when the solution is just short of an extreme pH and dissolve every BONE or FAT block at once. Reagents are replenished by clearing bubbles.

【HARD MODE AND MEAT】

Reach 100,000 points in a single game to unlock HARD MODE.

The falling speed increases, more waste blocks appear, and a special biological mass called MEAT enters the chamber. Clear OXY and HYDRO in alternating order to trigger a combined acid-base reaction and completely break it down.

【KEY FEATURES】

・Intuitive controls: tap to rotate, swipe to move and drop

・An automatic play guide demonstrating controls and pH reactions

・Living bubbles that breathe, stick together, and move their googly eyes

・Foaming, emulsification, reagent injection, and splatter effects

・Dark laboratory BGM and reaction-specific sound effects

・Pause controls and automatic suspension when the app moves to the background

・Online rankings using your chosen nickname

Ads appear only on the START screen and never during gameplay. An in-app purchase is available to remove ads, and previous purchases can be restored.

An internet connection is required for rankings, advertising, purchases, and purchase restoration.