Comparison

Bubble Bobble 2 classic vs KeyQ Cosmic Defender

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Bubble Bobble 2 classic

Embark on a classic arcade adventure where you play as a bubble dragon, trapping enemies in bubbles and popping them to progress through magical worlds. Utilize unique character abilities and power-ups to overcome challenges and defeat bosses.

Highlights
  • Trap enemies in bubbles
  • Pop enemies with horns or scales
  • Auto-shot and gauge shot functions
  • Select stages after defeating bosses
  • Acquire power-up items
  • Gather E, X, T, E, N, D bubbles for extra lives
Features
Read full description

Bubblun, Bobblun, Kululun, Cororon have been cursed by Superdrunk after reading the sealed book then turned to bubble dragon and trapped in the world of the book. It is an action game that selecting one of 4 character with different ability by shooting bubbles to trap the enemy, then pop it with horns or scales to defeat them. [How to operate] Move left and right by touching the screen, and able to play the game by pressing fire or jump button. [Feature] - Fire the bubbles automatically by using auto-shot function. - Fire the gauge shot by pressing fire button temporally. - Select desired stage after defeat the middle boss. - Enhance the Bubble dragon by acquiring power up item. - Character’s life will increase by gathering E, X, T, E, N, D bubbles. - Get additional scores by acquiring bonus item after defeat the enemies. - Undefeatable enemy Skel-Monsta will chasing the character if the player exceed certain amount time on the stage. [Notice] - This game is for mobile version, so it may have some differences from the existing arcade game. © TAITO CORPORATION 1994, 2022 ALL RIGHTS RESERVED. Facebook : https://www.facebook.com/mobirixplayen YouTube : https://www.youtube.com/user/mobirix1

About

KeyQ Cosmic Defender

Features
Read full description

Cosmic Defender is a fast-paced space shooter where you pilot a sleek starfighter and defend the galaxy against waves of enemies and asteroids. Your mission is simple: survive as long as possible, rack up combos, and push your score higher with every run. The game features responsive controls with a customizable joystick layout that supports both left-handed and right-handed players. Fire manually or enable auto-fire to focus on dodging incoming bullets and weaving through chaotic battlefields. Enemies come in multiple types, each with unique movement patterns, strengths, and weapons. Scouts are fast but fragile, bombers are slow but heavily armored, and elites bring devastating attacks and higher health. Asteroids add unpredictability, forcing you to stay sharp. As you clear each wave, the challenge increases with tougher enemy formations and faster spawns. To aid you in battle, power-ups randomly appear when enemies are destroyed. Collect the shield to block incoming damage, rapid fire to unleash a stream of shots, or double shot to fire twin lasers for maximum destruction. Combining power-ups with combos rewards skilled play and leads to massive score multipliers. Cosmic Defender also includes a high score system with automatic tracking of your top performances. Enter your name when you set a new record and compete against yourself to climb your personal leaderboard. Each score records the wave reached, final score, and date, making it easy to track your progress over time. The visual design blends a dark cosmic background with glowing neon colors, particle effects, and vibrant explosions that bring the action to life. Engine glows, shield pulses, and detailed enemy ships create a retro arcade feel with a modern style. Haptic feedback adds extra impact to hits, power-ups, and explosions, creating a more immersive gameplay experience. Whether you are chasing the next wave, aiming for a higher combo, or just enjoying a few minutes of arcade-style action, Cosmic Defender is built to be fun, challenging, and replayable. Features: - Classic arcade-inspired space shooter gameplay - Multiple enemy types with unique patterns - Power-ups including shield, rapid fire, and double shot - Combo scoring system with bonus rewards - Endless waves that increase in difficulty - Customizable left- or right-handed control layout - Manual fire or auto-fire toggle - Neon visuals with particle and glow effects - Haptic feedback for responsive feel - High score leaderboard with name entry Take control of your starship, defend the galaxy, and prove you have what it takes to be the ultimate Cosmic Defender.

Screenshots

Bubble Bobble 2 classic4 screens
KeyQ Cosmic Defender4 screens

Verdict

The call

The clearest difference is in-app purchases: KeyQ Cosmic Defender at none against Bubble Bobble 2 classic's 6. KeyQ Cosmic Defender also leads on ads (none vs shown) and update cadence (daily vs every 3 months). Bubble Bobble 2 classic's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bubble Bobble 2 classic sells 6 one-off in-app purchases. KeyQ Cosmic Defender asks for nothing beyond the download.

UpkeepUpdate frequency

Bubble Bobble 2 classic ships an update every 3 months, KeyQ Cosmic Defender daily. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard5 real differences · 5 level
Bubble Bobble 2 classic versus KeyQ Cosmic Defender: the parameters behind the verdict, then further details
ParameterBubble Bobble 2 classicKeyQ Cosmic Defender
PriceFreeFree
Rating4.1 (23 ratings) — better—
Positive reviews51.9% of reviews—
Number of ratings23 — better—
Update frequencyEvery 3 monthsDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size205 MB18 MB
Age rating4+4+
DeveloperMOBIRIXKeyQ, Inc.

In-app purchases

6 purchases

Bubble Bobble 2 classic

One-time6
  • Purchase 300 Dia$2.99
  • Purchase 500 Dia$4.99
  • Purchase 1,100 Dia$9.99
Show 3 more
  • Purchase 3,600 Dia$29.99
  • Purchase 6,500 Dia$49.99
  • Purchase 15,000 Dia$99.99
None

KeyQ Cosmic Defender

No in-app purchases

Questions

Is Bubble Bobble 2 classic free?
Bubble Bobble 2 classic is free to download, with in-app purchases available.
Is KeyQ Cosmic Defender free?
KeyQ Cosmic Defender is free to download, with no in-app purchases.
Do Bubble Bobble 2 classic or KeyQ Cosmic Defender have ads?
Bubble Bobble 2 classic shows ads; KeyQ Cosmic Defender does not.
Which is updated more often, Bubble Bobble 2 classic or KeyQ Cosmic Defender?
Bubble Bobble 2 classic ships an update every 3 months, and KeyQ Cosmic Defender daily. Most recently, Bubble Bobble 2 classic was updated on October 27, 2026 and KeyQ Cosmic Defender on October 28, 2026.

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