Coastal tower defence · iPhone & iPad
X-Factor Defense
Kaiju are rising from the sea. Hold the coast!
Your heroes stand on platforms behind a sea wall while crabs, starfish, flying fish, squid and giant kaiju surge out of the waves. Pick your team, time your ultimates, play the tides — and don't let the wall fall.
How you hold the coast
Defend the sea wall
Monsters rise from the sea across three lanes. Your heroes fire from behind the wall; every star you earn depends on how much of the wall is still standing.
Master the elements
Water beats Fire, Fire beats Nature, Nature beats Earth, Earth beats Lightning, Lightning beats Water. From 4★ a hero awakens a second element and sets off one of 10 reactions.
Raise eight heroes
Level them up, raise their stars and unlock new ones with Soul and Mine. Each hero's look changes at every tier from 1★ to 6★, and at 6★ the ultimate turns into its supreme form.
Play the tide
From level 1-6 the tide rises and falls mid-battle: high water brings monsters in closer and faster, low water leaves them wading slowly over the sandbars.
Gear up and build
Equip each hero with a weapon, armour and a charm in four rarities, raise the sea wall through ten levels, and use bombs, barricades, repair kits and freezes in battle.
Come back every day
Daily and weekly missions, achievements, a daily shop with chests whose odds are shown up front, and Mine that keeps piling up while you are away.
The element circle
- Water
- Fire
- Nature
- Earth
- Lightning
- Water
Beat monsters of an element to collect its Soul, then use it to raise heroes of that element.
Meet the defenders
Five heroes, one per element, plus three with a trait of their own. Shown here at 6★.
Chapter 1 boss
The Volcano Turtle
It surfaces in a ring of foam at levels 1-5, 1-10 and 1-15, stronger every time. At 70 % and 30 % health it flies into a rage, and its shell cracks open to show the lava inside. Beat it for elemental cores to awaken your heroes.
Screenshots
At a glance
- Platforms
- iPhone and iPad, iOS 15 or later (portrait)
- Languages
- English, Tiếng Việt
- Content
- Chapter 1: 15 levels, 3–4 waves each, one boss
- Connection
- Plays fully offline
- Progress
- Saved on your device
- Developer
- ISEMI
Questions
When can I play?
X-Factor Defense is coming soon to the App Store for iPhone and iPad. This page will link to the store listing as soon as it is live.
Do I need an internet connection?
No. The whole game runs on your device and plays offline.
Where is my progress saved?
On your device only — there are no accounts or servers. Your progress is included in your normal iPhone or iPad backup, so restoring a backup restores your game. Deleting the app deletes its progress.
Can I change the language?
Yes. Tap EN or VI at the top of the home screen to switch between English and Vietnamese at any time.