Chonky Kaiju: Idle City Smash
Casual In-app purchases Contains ads
Grow a chonky kaiju and smash the city! 26 evolutions, hidden mechas, no gacha.
- Downloads
- 95+
- on Google Play
- Price
- Free
- In-app purchases
- Updated
- Oct 26
- 2026 · v1.9.9
Screenshots
About Chonky Kaiju: Idle City Smash
STOMP! CRASH! Grow a cute voxel kaiju and bring down the city, block by block.
Chonky Kaiju is a portrait idle game about destruction and growth. Your kaiju attacks automatically. Choose which building to target, then use Stomp, your form's skill and a charged Rampage to break through resistance.
■ DESTROY, UPGRADE, CONQUER
Earn gold from buildings and invest in Power, Vitality, Speed and Greed. Destroy the command facility and enough buildings to challenge the zone boss. Beat the boss to march into the next district. If you lose, strengthen your kaiju and try again.
■ DIFFERENT DISTRICTS, DIFFERENT TACTICS
From the second city, dense blocks reward chain destruction, fortified facilities demand focused damage, and reinforcement districts put you under early pressure. Take down the command facility to stop reinforcements. The city's playable area grows with your kaiju.
■ PARTS THAT GROW AUTOMATICALLY
Collect Horns, Claws, Scales and Tails. Matching parts merge automatically, and your highest tier is equipped. All four passive bonuses apply. Choose one free specialty: chain collapse, facility and boss attacks, Rampage healing, or multi-target strikes.
■ MAKE RAMPAGE COUNT
Destruction charges the rage gauge. Activate Rampage when you need a burst against a tough target. Choose when to use your form's special skill, or use its automatic mode.
■ 26 KAIJU FORMS
Conquer the first two cities to begin rebirth. Keep permanent growth while starting a new run, earn evolution stones, and use DNA to unlock new forms. Explore fire, deep-sea and earth lineages, hidden mechas and the Cosmic Kaiju. Each form has its own skill. Build mastery and invest in permanent research to push your frontier further.
■ ONE NEW GOAL AT A TIME
Parts, evolution, collection and challenges appear as you progress. After your first rebirth, advancing into new cities gradually opens Boss Rush, 60s Smash, the Trial Tower and more. Existing players keep their unlocked challenges.
■ MISSIONS AND SEASON REWARDS
Check daily missions inside the Season Pass. Complete and claim missions to gain pass experience, reach reward levels and collect free rewards. An optional premium track adds rewards for the current season.
■ RETURN AND GROW
Collect offline gold, supply crates, daily rewards and achievement rewards. Return to improve your build and challenge the next boss. Optional packs, skins and rewarded ads support your progress. No random character draws.
■ CLOUD SAVE
Optional Google Play Games sign-in supports cloud saves and leaderboards. The core game can be played offline without an account.
Which district will your kaiju conquer next?
Chonky Kaiju is a portrait idle game about destruction and growth. Your kaiju attacks automatically. Choose which building to target, then use Stomp, your form's skill and a charged Rampage to break through resistance.
■ DESTROY, UPGRADE, CONQUER
Earn gold from buildings and invest in Power, Vitality, Speed and Greed. Destroy the command facility and enough buildings to challenge the zone boss. Beat the boss to march into the next district. If you lose, strengthen your kaiju and try again.
■ DIFFERENT DISTRICTS, DIFFERENT TACTICS
From the second city, dense blocks reward chain destruction, fortified facilities demand focused damage, and reinforcement districts put you under early pressure. Take down the command facility to stop reinforcements. The city's playable area grows with your kaiju.
■ PARTS THAT GROW AUTOMATICALLY
Collect Horns, Claws, Scales and Tails. Matching parts merge automatically, and your highest tier is equipped. All four passive bonuses apply. Choose one free specialty: chain collapse, facility and boss attacks, Rampage healing, or multi-target strikes.
■ MAKE RAMPAGE COUNT
Destruction charges the rage gauge. Activate Rampage when you need a burst against a tough target. Choose when to use your form's special skill, or use its automatic mode.
■ 26 KAIJU FORMS
Conquer the first two cities to begin rebirth. Keep permanent growth while starting a new run, earn evolution stones, and use DNA to unlock new forms. Explore fire, deep-sea and earth lineages, hidden mechas and the Cosmic Kaiju. Each form has its own skill. Build mastery and invest in permanent research to push your frontier further.
■ ONE NEW GOAL AT A TIME
Parts, evolution, collection and challenges appear as you progress. After your first rebirth, advancing into new cities gradually opens Boss Rush, 60s Smash, the Trial Tower and more. Existing players keep their unlocked challenges.
■ MISSIONS AND SEASON REWARDS
Check daily missions inside the Season Pass. Complete and claim missions to gain pass experience, reach reward levels and collect free rewards. An optional premium track adds rewards for the current season.
■ RETURN AND GROW
Collect offline gold, supply crates, daily rewards and achievement rewards. Return to improve your build and challenge the next boss. Optional packs, skins and rewarded ads support your progress. No random character draws.
■ CLOUD SAVE
Optional Google Play Games sign-in supports cloud saves and leaderboards. The core game can be played offline without an account.
Which district will your kaiju conquer next?
What’s new
Version 1.9.9 · Updated October 26, 2026
More goals in your first city! Zones 3 to 5 now give short quests: smash a pile with your skill, beat each zone boss, open the Supply Crate and power up. Every quest pays gold, so there is always something to buy on the way to your first conquest.