Comparison

Alien Annihilation Agent vs Geometry Tower

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

Head to head
About

Alien Annihilation Agent

Defend humanity's last hope by strategically deploying and upgrading defensive towers. Prevent waves of alien creatures from reaching your base in this engaging mobile strategy game.

Highlights
  • Strategic tower deployment
  • Tower upgrades for enhanced power
  • Prevent enemy base invasion
  • Intuitive interface
  • Short play sessions
  • Mobile-friendly gameplay
Features
Read full description

In the near future, the Earth has developed science and technology by leaps and bounds, but the depletion of resources, destruction of the environment, Due to the explosion of mankind, all mankind was risking their lives to enter space. Then, the Alpha Woori Nebula made a great discovery that would change the future of mankind. It was a mineral called Solstone named after the sun god in Roman mythology. Upon arrival at the planet Erga, the fleet selected the planet's main strongholds and classified them into 50 sectors, building bases and starting mining. But Erganid, who was acting like a wild animal, started attacking human bases, The vast majority of humanity and bases have been captured. Only the red canyon production base located in sector 32 is humanity's last hope. The Alien Annihilation Agent game is an addictive strategy mobile game. This game gives you the fun of growing up by deploying and upgrading various towers to prevent enemy attacks. The goal of the game is to prevent enemies from entering your base. To do this, you can build various kinds of towers around you. Each tower has a specific attack capability, and you should select and deploy the tower according to the situation. Towers play an important role in the game. Upgrading the tower helps improve attack power, range, and attack speed. As the game progresses, more powerful enemies emerge, so upgrading the tower is essential. The Alien Annihilation Agent provides a play session with a low entry barrier and a short time to enjoy. Easy operation and intuitive interface for anyone to play with. You are now ready to fight against large-scale enemies! Easily enjoy anytime, anywhere on your mobile device. Download today to survive and win Alien Annihilation Agent.

About

Geometry Tower

Engage in strategic tower defense battles with roguelike elements. Upgrade your tower, collect resources, and refine your tactics to withstand endless waves of enemies. Enjoy stylized geometric art and addictive idle gameplay.

Highlights
  • Roguelike gameplay with upgrade choices
  • Idle tower defense with resource collection
  • Strategic tower upgrades and research
  • Endless waves of enemies
  • Stylized geometric art design
Features
Read full description

Defend your tower with strategy in battles, and enjoy exciting challenges of this Roguelike game! -Roguelike Gameplay Choose from numbers of upgrades to make it an indestructible tower after endless waves of enemies in roguelike battles. Experience the fun of Roguelike! -Idle Tower Defense Addictive tower defense gameplay with idle mechanism. Easy to play, defend against the attacks from enemies with simply clicks. Collect resources from battles to level up the ATK and HP of your tower. In the meantime, develop the researches of your tower to power up. -Defeat With Strategy Upgrade your tower to be stronger with strategy and continue to refine your strategy with each battle. You have to defend the tower from waves of enemies to the last second. Prove your tactical skills in these thrilling challenges and achieve the victory. - Stylized Art Design Elements in the game are designed with simple geometric shapes in a stylized way.

Screenshots

Alien Annihilation Agent4 screens
Geometry Tower4 screens

Verdict

The call

The clearest difference is in-app purchases: Alien Annihilation Agent at none against Geometry Tower's 16. Alien Annihilation Agent also leads on rating (5.0 vs 4.7) and iOS requirement (12.0 vs 15.0). Geometry Tower's advantage is ratings volume (4.7K vs 1). On price, update cadence, ads 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. Geometry Tower sells 16 one-off in-app purchases. Alien Annihilation Agent asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Alien Annihilation Agent holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Geometry Tower has 4.7K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Alien Annihilation Agent ships an update every 3 weeks, Geometry Tower fortnightly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
Alien Annihilation Agent versus Geometry Tower: the parameters behind the verdict, then further details
ParameterAlien Annihilation AgentGeometry Tower
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (4.7K ratings)
Positive reviews—26.5% of reviews
Number of ratings14.7K — better
Update frequencyEvery 3 weeksFortnightly — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size239 MB265 MB
Age rating4+4+
DeveloperGRAVITY NEOCYONCYBERJOY LIMITED

Customer experience

Alien Annihilation Agent

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Geometry Tower

All ratings4,690 ratings
Positive91.1%
Neutral1.8%
Negative7.1%
Written reviews663 reviews
Positive26.5%
Neutral14.9%
Negative58.5%

Bugs and requests

Alien Annihilation Agent

Not enough reviews yet to summarise bugs or requests.

Geometry Tower

Reported bugs

3 issues
  • Ads causing game freezes and crashes
  • Inability to rejoin battles after ad interruptions
  • Weapon/upgrade selection issues

Requested features

4 requests
  • Add an endless mode
  • Improve weapon/upgrade selection and progression
  • Optimize performance and reduce overheating
  • Reduce reliance on ads and in-app purchases

In-app purchases

None

Alien Annihilation Agent

No in-app purchases

16 purchases

Geometry Tower

One-time16
  • 240 Diamonds$2.99
  • Golden Piggy 1$2.99
  • Pack 1$2.99
Show 13 more
  • Common Battle Pass$4.99
  • Golden Piggy 2$4.99
  • Pack 2$4.99
  • Normal Growth Fund 1$6.99
  • Delux Monthly Card$9.99
  • Rare Battle Pass$9.99
  • Pack 4$9.99
  • Delux Growth Fund 1$19.99
  • Pack 5$19.99
  • Pack 6$29.99
  • Delux Card Upgrade$39.99
  • Pack 7$49.99
  • Delux Life Time Card$49.99

Questions

Is Alien Annihilation Agent free?
Alien Annihilation Agent is free to download, with no in-app purchases.
Is Geometry Tower free?
Geometry Tower is free to download, with in-app purchases available.
Which has better reviews, Alien Annihilation Agent or Geometry Tower?
Alien Annihilation Agent is rated higher. Alien Annihilation Agent averages 5.0 out of 5 from 1 ratings, while Geometry Tower averages 4.7 from 4.7K ratings.
Do Alien Annihilation Agent or Geometry Tower have ads?
Both Alien Annihilation Agent and Geometry Tower show ads.
Which is updated more often, Alien Annihilation Agent or Geometry Tower?
Alien Annihilation Agent ships an update every 3 weeks, and Geometry Tower fortnightly. Most recently, Alien Annihilation Agent was updated on October 24, 2026 and Geometry Tower on October 30, 2026.

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