Comparison

Defense Zone 3 HD vs Orbital Defense Protocol

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

Head to head
About

Defense Zone 3 HD

Defend your territory against relentless enemy armies in this action-strategy game. Strategically place and upgrade a variety of turrets, utilizing special abilities to overcome increasingly challenging waves. Enjoy dynamic battles with stunning visuals and flexible difficulty settings.

Highlights
  • Variety of turrets
  • Special abilities
  • Flexible difficulty levels
  • Diverse landscapes
  • Strategic placement and upgrades
  • Dynamic battles
Features
Read full description

Welcome to the long-awaited sequel to the popular action/strategy game! New weapons, landscapes, and options galore! Every game session is now even more dynamic and amazing. The core of the game is still the same: entire armies of enemies rush at your defenses, trying to destroy them by any means necessary. But now they’re even more powerful and madder than ever. You’ll have access to older, time-tested turrets, as well as completely new types of weapons. It’s up to you to decide how to spend your available budget. Should you build new towers or upgrade and fortify the ones you already have? Turrets vary in terms of their attack range, firing speed, and damage type. The only way to win is to combine them so that they complement and strengthen one another. The flexible difficulty settings will allow every player to get as much enjoyment out of the game as possible. If you’re an experienced commander, you’ll love the merciless, intense battles where the countdown where even a fraction of a second is vital to success and everything hinges on your ability to choose and arrange your turrets wisely. If you’re a new player, you’ll easily be able to train and prepare yourself for serious battles. Either way, the thoughtfully designed maps and wide range of available turrets will provide you with virtually endless tactical options. Thanks to the stunning, detailed landscapes, painstakingly drawn towers, and incredible special effect, you won’t be able to take your eyes off the screen. All aspects of the game have been meticulously balanced, including tower statistics, enemy strength, terrain characteristics, and special weapons. You’ll never get bored by too-easy gameplay. Every level will challenge you. Are you ready to accept the challenge? Features: • Four difficulty levels • Eight kinds of turrets • Eight special abilities, from Air Strikes to Nuclear Bombs • Varied seasons and types of landscapes • Support for over 60 languages

About

Orbital Defense Protocol

Features
Read full description

Orbital Defense Protocol is a fast, focused, portrait-mode tower defense for iPhone and iPad. Place turrets, set traps, call orbital strikes, and hold the line through 10 sections of escalating hostile waves. CORE LOOP • Drag turrets onto the grid during prep. Tap to upgrade, sell, or specialise. • 6 archetypes: Pulse, Railgun, Frost, Blast, Gatling, and Command. Each upgrades in three channels (Damage / Range / Rate) and forks into a permanent specialisation at tier 6. • 5 trap and ability cards: Spike Strip, Slow Goo, Knockback Plate, Orbital Strike, and Stasis Field. Drag to deploy. • Tap MONSTERS to see the next wave's hostile profile — HP, speed, armor, shield resist — and pick the right damage type. DESTRUCTIBLE BATTLEFIELD • Walling off the path is legal. Hostiles will pound your turrets to rubble — every tower has hull HP, every enemy has melee DPS. • Rocks blocking your line of fire? Tap them. Spend $50, clear the tile, reroute the enemy path. • 7 hostile archetypes: BASIC, FAST, TANK, FLIER, SHIELDED, HEALER, BOSS. Each has its own counter. CAMPAIGN • 10 sections × 20 waves = 200 levels. • 5 difficulties from Easy to Extreme — adjustable per run. • Persistent top-scores leaderboard tracks your best clears and wipes. NO FRICTION • No ads. • No in-app purchases. • No network required — plays anywhere. • No data collected, no analytics, no tracking. Built for one-handed portrait play. Boots in seconds, drops you straight into the build phase. Set a difficulty, tap ENGAGE HOSTILES, and defend.

Screenshots

Defense Zone 3 HD4 screens
Orbital Defense Protocol4 screens

Verdict

The call

The clearest difference is price: Defense Zone 3 HD at Free against Orbital Defense Protocol's $0.99. Orbital Defense Protocol's advantage is in-app purchases (none vs 6) and ads (none vs shown). On device support and iOS requirement 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

Defense Zone 3 HD is free to download; Orbital Defense Protocol costs $0.99 up front. Defense Zone 3 HD sells 6 one-off in-app purchases. Orbital Defense Protocol asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Defense Zone 3 HD versus Orbital Defense Protocol: the parameters behind the verdict, then further details
ParameterDefense Zone 3 HDOrbital Defense Protocol
PriceFree — better$0.99
Rating4.6 (2.5K ratings) — better—
Positive reviews68.3% of reviews—
Number of ratings2.5K — better—
Update frequencyEvery 3 months—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size378 MB68 MB
Age rating12+4+
DeveloperArtem KotovCarlos Nieto

Bugs and requests

Defense Zone 3 HD

Reported bugs

3 issues
  • Constant crashes
  • Inverted/flipped screen after ads
  • Inability to save progress

Requested features

3 requests
  • Endless mode
  • Better zoom and camera controls
  • More detailed weapon information

Orbital Defense Protocol

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Defense Zone 3 HD

One-time6
  • 3000 Coins$1.99
  • Remove Ads$2.99
  • 9000 Coins$4.99
Show 3 more
  • 20250 Coins$9.99
  • 56250 Coins$24.99
  • 262500 Coins$99.99
None

Orbital Defense Protocol

No in-app purchases

Questions

Is Defense Zone 3 HD free?
Defense Zone 3 HD is free to download, with in-app purchases available.
Is Orbital Defense Protocol free?
Orbital Defense Protocol costs $0.99, with no in-app purchases.
Do Defense Zone 3 HD or Orbital Defense Protocol have ads?
Defense Zone 3 HD shows ads; Orbital Defense Protocol does not.

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