Comparison

Defend Your Castle vs RetroArch

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

Head to head
About

Defend Your Castle

Defend your castle from waves of crayon invaders by strategically upgrading defenses and deploying various troop types. Utilize powerful spells and unlock achievements as you face unlimited levels of challenging gameplay.

Highlights
  • Battle diverse enemy invaders
  • Upgrade castle defenses
  • Convert and assign soldiers
  • Cast powerful spells
  • Earn achievements
  • Unlimited levels
Features
Read full description

Best-selling Nintendo WiiWare hit and Casual Game of the Year nominee. The original game of castle defense -- accept no imitation! PRESS "You'd be insane not to give Defend Your Castle a download. Final Score 9/10" - Joystiq.com "It’s more cathartically satisfying than bubble wrap and a whole lot prettier" - iPhone Games Network Featured in Apple's "Best Castle Defense Games" UPDATES New in 1.0.3: You can now further upgrade your castle's defenses, each tower has three levels of effectiveness, making your army even more powerful than before! New in 1.0.2: Earn up to 45 medals as you play -- with the all-new achievements system! DESCRIPTION Prepare to Defend your Castle against the relentless army of crayon invaders! Those crafty barbarian hordes have amassed their forces once again to challenge your domain. Will you and your court rise to the challenge, or stand aside as they raze your Castle to the ground? FEATURES • Battle many different types of enemy invaders, requiring varying tactics to defeat • Upgrade your kingdom with fortified walls, the archery range, wizard tower, craftsmen's workshop, and the demolition laboratory • Strengthen your forces by converting soldiers and assigning them as Archers, Wizards, or Craftsmen to work within your castle or deploying them as Bombers • Cast powerful spells with the aid of your Wizards • Your superb defending abilities now earn you up to 45 new achievements! • Unlimited levels: Continue to grow the strength of your Kingdom indefinitely • Heroic difficulty mode for players of royal descent

About

RetroArch

This application serves as a versatile frontend for emulators and game engines, supporting a vast array of systems through downloadable cores. It offers advanced features like netplay, save states, and customizable controls for an enhanced gaming experience.

Highlights
  • Supports numerous gaming systems via libretro cores
  • Netplay for multiplayer gaming
  • Save states and fast forward/rewind
  • Controller support and key remapping
  • Customizable shaders and overlays
  • RetroAchievements integration
  • AI translations for games
Features
Read full description

RetroArch is a free, ad-free, open source, and cross platform frontend/framework for emulators, game engines, video games, media players, and other applications. Supported systems come in the form of libretro cores. The following systems are supported through various cores: * 2048 * Acorn - BBC Micro * Amstrad - CPC/GX4000 * Anarch * Arcade * Arduboy * Atari - 2600 * Atari - 5200 * Atari - 7800 * Atari - Jaguar * Atari - Lynx * Bandai - WonderSwan/Color * Cave Story * Coleco - ColecoVision * Commodore - Amiga * Commodore - C128 * Commodore - C64 * Commodore - C64 SuperCPU * Commodore - CBM-II 5x0 * Commodore - CBM-II 6x0/7x0 * Commodore - PET * Commodore - PLUS/4 * Commodore - VIC-20 * Dinothawr * Doom * DOS * Fairchild ChannelF * Flashback * GCE - Vectrex * Game Music Emu * Handheld Electronic * MSX/SVI/ColecoVision/SG-1000 * Mattel - Intellivision * Mega Duck / Cougar Boy * Mr.Boom * NEC - PC Engine / SuperGrafx / CD * NEC - PC-FX * NEC - PC-98 * Nintendo - DS * Nintendo - Game Boy / Color * Nintendo - Game Boy Advance * Nintendo - NES / Famicom * Nintendo - Nintendo 64 * Nintendo - Pokemon Mini * Nintendo - SNES / SFC * Nintendo - Virtual Boy * Palm OS * PocketCDG * Quake * Quake II * Rick Dangerous * SNK - Neo Geo AES/MVS * SNK - Neo Geo CD * SNK - Neo Geo Pocket / Color * ScummVM * Sega - MS/GG/MD/CD/32X * Sega - MS/GG/SG-1000 * Sega - Saturn * Sharp - X68000 * Sinclair - ZX Spectrum * Sony - PlayStation * Sony - PlayStation Portable * Texas Instruments TI-83 * The 3DO Company - 3DO * Thomson - MO/TO * Vircon32 * VirtualXT * WASM-4 * Watara - Supervision RetroArch supports a broad range of features, including: * Netplay * Soft patching * RetroAchievements * Save states * MFi controller support * Key remapping per core or per game * Gyro * Cheats * Custom overlays * Shaders * Fast forward and rewind * Game artwork * AI translations * Advanced latency management **RetroArch and Libretro are in no way affiliated with Nintendo. The name "Nintendo" and all associated game console names are registered trademarks of Nintendo Co., Ltd.**

Screenshots

Defend Your Castle4 screens
RetroArch4 screens

Verdict

The call

The clearest difference is price: RetroArch at Free against Defend Your Castle's $0.99. RetroArch also leads on rating (4.3 vs 3.9) and ratings volume (1.9K vs 31). Defend Your Castle's advantage is iOS requirement (9.3 vs 12.0). On review sentiment, ads and in-app purchases 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

RetroArch is free to download; Defend Your Castle costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RetroArch holds the better App Store score, 4.3 against 3.9. That said, the two scores are not equally well evidenced: RetroArch has 1.9K ratings behind it against 31, so its average is the more settled of the two. Written reviews complicate that: 76% of Defend Your Castle's written reviews are positive against 69% of RetroArch's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Defend Your Castle ships an update every 3 weeks, RetroArch weekly. Both last shipped on November 6, 2026.

Scorecard7 real differences · 3 level
Defend Your Castle versus RetroArch: the parameters behind the verdict, then further details
ParameterDefend Your CastleRetroArch
Price$0.99Free — better
Rating3.9 (31 ratings)4.3 (1.9K ratings) — better
Positive reviews76.3% of reviews — better69.1% of reviews
Number of ratings311.9K — better
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, iPad, iPod, Mac, Apple TV — better
Requires iOS9.3 — better12.0
Further details — not scored
Size69 MB652 MB
Age rating9+9+
DeveloperXGen StudiosLibretro

Customer experience

Defend Your Castle

All ratings31 ratings
Positive71.0%
Neutral6.5%
Negative22.6%
Written reviews283 reviews
Positive76.3%
Neutral7.1%
Negative16.6%

RetroArch

All ratings1,547 ratings
Positive82.7%
Neutral6.9%
Negative10.5%
Written reviews1,470 reviews
Positive69.1%
Neutral11.3%
Negative19.6%

User reviews

Defend Your Castle

From 31 App Store ratings

What we love

  • 🚀 Addictive gameplay
  • 👍 Charming and creative visuals
  • 🕹️ Responsive touch controls
  • 💰 Great value for money
  • 🕹️ Faithful port of the original game

Room to improve

  • 🐛 Crashes and save issues
  • 🔁 Repetitive gameplay at higher levels
  • 🔍 Lack of new enemy types and spells
  • 🔇 No option to play own music
  • 🤕 Can be tiring on the fingers

RetroArch

From 1.9K App Store ratings

What we love

  • 🚀 Smooth emulation performance
  • 🎮 Wide range of supported systems
  • 🕹️ Controller support
  • 💯 Comprehensive emulation features
  • 🔓 No ads or tracking

Room to improve

  • 🤯 Steep learning curve
  • 🤖 Unintuitive user interface
  • 🐛 Stability issues and crashes
  • 🔌 Slow loading times
  • 🤷‍♂️ Inconsistent core support

Bugs and requests

Defend Your Castle

Reported bugs

3 issues
  • Achievements not tracking correctly
  • Saved games not loading properly
  • Archers not functioning as expected

Requested features

5 requests
  • More enemy variety and difficulty scaling
  • Ability to assign converted units to towers
  • Endurance/endless mode
  • Game Center integration for leaderboards and achievements
  • Option to use original game graphics

RetroArch

Reported bugs

5 issues
  • N64 games not loading textures properly
  • Crashes when changing settings or cores
  • Bios files not being recognized
  • Inconsistent performance across devices
  • Saved settings not persisting

Requested features

5 requests
  • Add support for PS2, GameCube, and 3DS emulation
  • Improve iCloud/cloud storage integration
  • Implement customizable button layouts
  • Add a more user-friendly setup wizard
  • Provide better documentation and tutorials

In-app purchases

None

Defend Your Castle

No in-app purchases

None

RetroArch

No in-app purchases

Questions

Is Defend Your Castle free?
Defend Your Castle costs $0.99, with no in-app purchases.
Is RetroArch free?
RetroArch is free to download, with no in-app purchases.
Which has better reviews, Defend Your Castle or RetroArch?
RetroArch is rated higher. Defend Your Castle averages 3.9 out of 5 from 31 ratings, while RetroArch averages 4.3 from 1.9K ratings.
Do Defend Your Castle or RetroArch have ads?
Neither Defend Your Castle nor RetroArch shows ads.
Which is updated more often, Defend Your Castle or RetroArch?
Defend Your Castle ships an update every 3 weeks, and RetroArch weekly. Most recently, Defend Your Castle was updated on November 6, 2026 and RetroArch on November 6, 2026.

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