Comparison

Tower Defense vs Alien Attack

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

Head to head
About

Tower Defense

Features
Read full description

Welcome to Void - a Skill-Driven Tower Defense Master the ultimate skill-based tower defense game on iOS. Infinite waves, deterministic combat, four tower classes, six maps, and global monthly leaderboards. Every run tests your strategy against escalating enemy waves, pure skill THE CORE • Four tower classes in this tower defense TD game: Projectile (single-target precision), Laser (rapid-fire piercing), Launch (heavy splash damage), Freeze (radial slow pulse) - each one with unique effects • Three tiers per tower with Enhance levels that scale damage, range, and fire rate — perfect for hardcore tower defense mastery. • Tap to cycle targeting: First, Close, Strong, or Weak (perk-locked). Infinite waves with bosses every 10 rounds: Tank → Swarm Parent → Shielded → Runner, plus mini-spawner events. SIX MAPS, FOUR DIFFICULTY TIERS • Normal: Forgiving entry to tower defense strategy. • Medium: Bypass & Peaks — asymmetric paths punish lazy placement. • Hard: Switchback & Weave — winding routes for expert tower defense players. • Practice: Non-ranked sandbox with custom HP scaling. Hard maps unlock via milestones on easier tiers in this endless tower defense experience. PROGRESSION & PERMANENT UPGRADES • Earn Glory Points (GP) every match. Spend on perks: Credit Surge, GP Fortune, Market Discount, Speed boosts (4× to 5.6×), and Weak Targeting. • Tower Masteries to L20 per class + Bonus Masteries to L120 for account-wide buffs. • Round milestones grant permanent GP multipliers (up to 3.0×). Plateau Bonus Tiles add 1.2× tower power. DAILY CHALLENGES & LEADERBOARDS Three rotating daily goals (Easy 150 GP to Hard 1,000 GP) for up to 1,550 extra GP. Global monthly tower defense leaderboard via Game Center. Six-tier Skill Rank ladder (F to S) with multipliers. Per-map Top Round boards + daily streak bonuses. iOS-NATIVE INNOVATION Your tower defense match stays visible on the Lock Screen and Dynamic Island — see round, enemies, and lives at a glance. Tap to resume instantly. Match Reminders ping for paused runs. Background-resilient design: force-quit and return exactly where you left off. 23 ACHIEVEMENTS & FAIR PROGRESSION Milestones, Boss Hunter, Tower Mastery, Pure Run (wave 50 no revives), and more. Everything earnable through gameplay. Optional GP packs for players who want to accelerate. iPhone & iPad. Portrait mode. Requires iOS 18.2+. Game Center optional for leaderboards and monthly tower defense rankings. Live Activity, Dynamic Island, and reminders work independently. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://voidgame.app/privacy/

About

Alien Attack

Control a rapidly evolving alien lifeform and conquer Earth. Consume humans to grow stronger, unlock new mutations, and dominate every battlefield. Upgrade your abilities and spread your alien domination across the planet.

Highlights
  • Evolve alien lifeform
  • Consume humans for energy
  • Unlock new mutations and powers
  • Action-packed battles
  • Upgrade abilities
  • Conquer world locations
Features
Read full description

Earth has become your hunting ground. Control a rapidly evolving alien lifeform, consume humans, and grow stronger with every invasion. Every battle makes you stronger. Every evolution unlocks new powers. Every city brings fresh prey. EVOLVE YOUR ALIEN Unlock powerful mutations, increase your strength, and transform into the ultimate lifeform. DEVOUR EVERYTHING Humans are your food. Hunt them down, consume them, and use their energy to grow even stronger. ACTION-PACKED GAMEPLAY Fight endless waves of enemies, destroy everything in your way, and dominate every battlefield. UPGRADE & MUTATE Discover new abilities, improve your attacks, and create unstoppable mutation combinations. CONQUER THE WORLD Invade new locations, face stronger enemies, and spread your alien domination across the planet. The invasion has begun. How far can your evolution go?

Screenshots

Tower Defense4 screens
Alien Attack4 screens

Verdict

The call

The clearest difference is in-app purchases: Alien Attack at none against Tower Defense's 4. Alien Attack also leads on update cadence (daily vs every 3 days) and iOS requirement (15.0 vs 26.2). Tower Defense's advantage is ads (none vs shown). On price and device support 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. Tower Defense sells 4 one-off in-app purchases. Alien Attack asks for nothing beyond the download.

UpkeepUpdate frequency

Tower Defense ships an update every 3 days, Alien Attack daily. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Tower Defense versus Alien Attack: the parameters behind the verdict, then further details
ParameterTower DefenseAlien Attack
PriceFreeFree
Rating—4.0 (3 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—3 — better
Update frequencyEvery 3 daysDaily — better
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.215.0 — better
Further details — not scored
Size23 MB180 MB
Age rating12+12+
DeveloperJonathan TaverasHAPPY GAME COMPANY TEKNOLOJI ANONIM SIRKETI

In-app purchases

4 purchases

Tower Defense

One-time4
  • Starter Pack$2.99
  • Standard Pack$9.99
  • Pro Pack$24.99
Show 1 more
  • Elite Pack$69.99
None

Alien Attack

No in-app purchases

Questions

Is Tower Defense free?
Tower Defense is free to download, with in-app purchases available.
Is Alien Attack free?
Alien Attack is free to download, with no in-app purchases.
Do Tower Defense or Alien Attack have ads?
Alien Attack shows ads; Tower Defense does not.
Which is updated more often, Tower Defense or Alien Attack?
Tower Defense ships an update every 3 days, and Alien Attack daily. Most recently, Tower Defense was updated on October 2, 2026 and Alien Attack on October 5, 2026.

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