Cell Hero: Idle Tower Defense

Germs have broken into the body, and one tiny hero stands in their way. Cell Hero is an idle tower defense game with a twist: instead of a tower, you defend with a brave immune cell in the center of the screen that fires at every germ on its own. You choose the upgrades, the powers and how deep into the body you go.

Idle defense that works while you are away
Your cell keeps earning Memory while you are offline, and Lab research runs in real time even when the game is closed. Come back, collect it and push further. It is an incremental game with real strategy.

Endless battle, a boss every 10th level
Bacteria, viruses, fungi and parasites keep coming in endless waves. Every 10th level a boss shows up. 30 bosses live across the body, five in each organ, and every one you defeat drops Antigens.

A journey through the human body
Fight from the Skin to the Lungs, Gut, Lymph Nodes, Bloodstream and finally the Brain. Every organ brings tougher germs and more Memory. Milestones on the Healing Path give extra rewards on the way.

Upgrade during the fight
Spend ATP mid-battle on Damage, Attack Speed, Crit, Health, Regen and more. Want faster progress? Speed up the battle.

9 powers your cell uses by itself
Fever Blast, Chain Zap, Freeze Field, Antibody Swarm, Spore Mines, Golden Cell, Acid Pool, Phago Vortex and Focus Beam. Unlock and upgrade them with Antigens, then build the combo that fits your style.

Grow stronger after every run
• Memory: permanent upgrades that stay forever.
• Lab: research runs in real time, even when the game is closed.
• Vaccines: collect 28 vaccine cards from chests, raise their stars and equip them for permanent bonuses.
• Pathogens: discover more germs and get rewards for each one.

A reason to come back every day
• Daily Bonus: a gift every day.
• Daily Tasks: finish them for rewards.
• Daily Challenge: a special rule each day. Climb the daily table and win Stem Gems for your place.

A cute hero against faceless germs
Your cell is round, brave and has a face. The germs are faceless blobs, spikes and tentacles, so wiping them out feels great.

Ads only when you want them
Watch a rewarded ad only if you want a bonus. Optional purchases: No Ads, Starter Pack and Stem Gems.

Love idle tower defense games? Become the immune hero the body needs and defend it from germs, one wave at a time.

Recent changes:
Gameplay balance tuned for a smoother journey.
Cleaner interface and quality-of-life improvements.
Various bug fixes.