MDS vs AI TD
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
MDS
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Something strange is happening. Cities are being taken over by waves of identical vehicles. But who or what is driving these vehicles? And in such precise formation? Several cities have already fallen. They are now creating vehicles too and in more varieties. These waves need to be stopped. This is a tough tower defense game. Can you make the right strategic choices? โข Wide variety of enemies, weapon types and maps โข Each gun has its own targeting mode:ย Nearest, Fastest, Slowest, Closest to the End etc. โข Buy the map chapters, once and play them for life โข Choose your commander to boost your defenses and unlock greater power as you progress. Strategy: You have many decisions to make, choose well and you will win. For example: โข Where should you deploy your guns?ย โข Which types of guns should you use? โข What targeting mode should you choose? โข Which booster bonus should you choose?ย More gems per kill, instant gems, cheaper upgrades? Aim of the game: Destroy the enemy vehicles before they reach the end of the map. Keep at it until all the waves of enemies are finished. If you can reach the end with lives to spare then you have completed the map/level. Level and map are used interchangeably, they mean the same thing. Simply surviving is not enough for a good score. How to play: Choose which weapon type to place and of course where to place it. Then simply drag and drop it into position. Tap on any placed weapon to upgrade, change its targeting mode or to sell it. Commanders: Commanders provide passive abilities and a special strike ability. Passive abilities are always active. They provide permanent bonuses, such as increased weapon damage, rate of fire, range, and other stats. The Special Strike ability is a powerful, targeted action that you activate manually. After use, it enters a cooldown before it can be used again. โข The base cooldown is 10 minutes โข Cooldown time can be reduced through upgrades To use a Special Strike: 1. When ready, the commanderโs image is replaced by a target icon 2. Click the target icon 3. Drag it to the area you want to strike 4. Release to activate the ability You need 'Points' to upgrade your commanderโs abilities. All commanders start with 10 Points when you first launch the game. You can earn more 'Points' by completing levels and receiving 'Star' ratings based on your performance Each 'Star' you earn gives you 1 Point. There are currently 9 commanders available (3 for each chapter) Each commander has different passive abilities and Special Strike options, allowing for different play-styles. General: Each map will provide different challenges as the set path enemies follow will change. Vehicles do not block each other. This makes for a more challenging game. Maps/levels are grouped into chapters. Buy the map chapters once and play the purchased maps for life.ย No other purchases are required to play and beat the game. Some guns are restricted to higher map/level but as soon as you successfully complete the required map/level, the gun will be available for subsequent levels. No purchase is required to unlock any gun. Chapter 3 has gun upgrades that are not available in chapter 1 and 2. There are 3 separate map chapters available for purchase. GambitAx Gems GambitAx Gems can be used to purchase or upgrade weapons. When spending gems, the game will use normal gems first, and then GambitAx Gems to cover any remaining cost. Buying GambitAx Gems isnโt required. You can beat the game without purchasing any. Awards: Gain awards by reaching the relevant threshold in a category. There are several award categories. New awards are given at the end of the level.ย Disclaimer: All in-game items and GambitAx Gems (premium currency) are purely virtual and hold no real-world value. They cannot be exchanged, transferred, or redeemed for cash or other real-world goods. Refunds are handled according to Appleโs policies.
AI TD
Defend humanity from an AI takeover by eliminating enemy forces. Upgrade your defenses and unlock new powers as you progress through increasingly challenging levels.
- Eliminate AI enemies
- Upgrade defenses
- Gain new powers
- Humanity's savior theme
- Challenging gameplay
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Become the savior of humanity! Eliminate AI enemies, upgrade your defenses, and gain new powers on the way!
Screenshots
Verdict
The clearest difference is ads: MDS at none against AI TD's shown. AI TD's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price, update cadence and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. MDS sells 7 one-off in-app purchases and AI TD sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
MDS ships an update monthly, AI TD fortnightly. The most recent releases landed on October 28, 2026 and October 7, 2026 respectively.
| Parameter | MDS | AI TD |
|---|---|---|
| Price | Free | Free |
| Positive reviews | โ | 25.0% of reviews |
| Update frequency | Monthly | Fortnightly โ better |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | โ | Ad-supported |
| Devices | iPhone | iPhone, iPad, iPod โ better |
| Requires iOS | 26.0 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 171 MB | 215 MB |
| Age rating | 12+ | 9+ |
| Developer | Bruce Mattison | Hot Yeti Studio OU |
In-app purchases
MDS
- 100 GambitAx Gems$0.99
- Hard and Insane Difficulties$0.99
- Chapter 3 Maps$1.99
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- 300 GambitAx Gems$1.99
- Chapter 1 Maps$2.99
- Chapter 2 Maps$2.99
- Play Maps in Any Order$3.99
AI TD
- Super Revive Pack 1$1.99
- Mini Pack$2.99
- No Ads$6.99
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- Tower Boost Pack 1$6.99
- Large Pack$7.99
- No Ads Bundle$9.99
- Full Pack$17.99









