Периметр: оборона колонии

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Everyone
1+
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Everyone
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About this game

"Perimeter" is a tower defense game about defending a colony on an alien planet at night. Enemies advance in waves toward your base, and you have turret sites, crystals for construction, and a reactor whose energy is insufficient for everyone. You must survive ten waves at each of the sixteen perimeters.

How to play
— Select a turret on the shelf at the bottom of the screen and tap an empty amber site. Turrets fire automatically.
— Tap a built turret to upgrade it or sell it. Sites are limited, so defenses are increased by upgrades.
— Monitor the reactor: each turret has its own energy consumption. When demand exceeds production, some turrets are de-energized and remain silent.
— An enemy breach destroys the base's integrity and lowers its ceiling: between waves, the base is restored only up to this ceiling.
— You can speed up the battle by half or pause it, and zoom in on the camera with a gesture.

What's inside
— 16 campaign stages with 10 waves each: Landing Pad, Gorge, Adit, Ring, Island, Crossroads, No Man's Land, Whirlwind, Two Fronts, Dome, Trident, Cargo Terminal, Ice Ridge, Lower Horizons, Pass, and Reactor Yard. Victory unlocks the next stage.
— Six turrets with upgrades up to level 3. The kinetic turret frequently hits the ground and air, the missile turret fires a salvo at ground targets, and the laser turret fires a powerful beam from afar. The energy pylon increases reactor output and slows nearby ground enemies with a discharge. Later stages are supplemented with an EMP coil, which slows nearby enemies, and a Tesla pylon, which operates for a short time and then burns out.
— Enemies: Crawlers, Carapacians, Speeders, Heavy Trucks, Flyers, and Titans. Reinforced vehicles with red visors are 2-3.5 times more durable, and missiles cannot detect flyers.
— Up to three stars per line: three are awarded for defending without a single breakthrough.

Features
— Reactor power grid: you must decide not only where to place a turret, but also whether there is enough power to power it.
— Night events, warned of a wave in advance: a dust storm reduces the range of turrets, a solar flare jams lasers and EMPs, and a reactor sag reduces output by 30%.
— Each line has its own geometry and hints: forks where the enemy chooses the path, two flanks, a spiral, three entrances, and an island in the middle of a ring road. The rules are collected on a separate screen in the menu.

Abilities and Headquarters
— Five abilities: Orbital Strike, Orbital Beam (which you can swipe across the map with your finger), Combat Robots, EMP Wave (which disables enemy vehicles), and Overload (which increases the rate of fire for all turrets). Abilities are unlocked at Headquarters using tokens, some of which require several victories, and can be upgraded to level five.
— The "Warehouse" and "Reactor" Headquarters upgrades add starting crystals and energy production and are active in all battles.
— Headquarters tokens are awarded for campaign stars, daily missions, daily streaks, and Battle of the Day.
— Three daily missions count in any battle and reset at midnight. Daily streaks award rations, and skipping a day does not break the streak.
— Daily streaks unlock after your first victory: a familiar questline with one of six modifiers, from "Afterburner" to "Generous Night," and 25 tokens for winning once per day.

For whom
For those who enjoy tower defense games that require careful consideration: where to place a turret, what to upgrade first, and how to spend energy. Pause at any time—convenient play both on the go and at home in the evening.

About the game
There is no registration or account required; the game works offline. Campaign progress, tokens, and settings are stored only on the device; the game does not have its own server.

Advertising
The game is free and contains advertising. Banners appear in the menu; they are not displayed in battle. Interstitial advertising appears only between battles: not during the first launch, no more than once every 150 seconds, and no more than three times per launch. Videos are available only with the "per video" button: crystal reinforcements, turret upgrades, ability charges, second chances, and doubling tokens. Everything in the game is unlocked by winning battles and earning tokens.

Support: Defaulyota@gmail.com
Tower defense: turrets, reactor power, and 16 night defense lines. Offline
Updated on
Oct 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Device or other IDs
  • This app may collect these data types
    Device or other IDs
  • Data is encrypted in transit
  • Data can’t be deleted

What’s new

Первая версия в Google Play.
Content rating
Everyone
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App support

About the developer
Gritskevich Vasili Yurevich, IP
defaulyota@gmail.com
kv.249, k.815 Zelenograd Москва Russia 124527
+7 917 518-77-51