MDS vs Synapse
Price, ratings, monetisation and update history for both games, side by side — 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? • Wide variety of enemies, weapon types and maps • Each gun has its own targeting mode: Nearest, Fastest, Slowest, Closest to the End etc. • Buy the map chapters, once and play them for life • 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: • Where should you deploy your guns? • Which types of guns should you use? • What targeting mode should you choose? • Which booster bonus should you choose? 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. • The base cooldown is 10 minutes • Cooldown time can be reduced through upgrades To use a Special Strike: 1. When ready, the commander’s 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 commander’s 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. 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 isn’t 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. 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 Apple’s policies.
Synapse
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Something is walking down your neural pathways, and it is not a thought. Synapse TD is a tower defense game set inside a nervous system that has, frankly, stopped coping. Sixteen signal paths. Thirty waves. An assortment of luminous enemies advancing steadily toward the part of you that remembers where you put your keys. Deeper in the network lies The Cortex: sixteen more maps where three signals converge into one trunk or two routes cross, four creatures built to punish the habits the first maps taught you, and sixteen crystalline engrams to collect. Unlock it with one purchase, or earn it by clearing every Neural Path. You are the immune response. You have lasers. BUILD A DEFENSE Eleven towers, from a modest green laser up to things that should probably require paperwork. Place them along the signal path, watch the firing arcs overlap, and feel briefly competent. Every tower earns its keep differently - some chip away steadily, some panic in short violent bursts, one is just there to slow things down and think about its choices. THE BANK IS THE REAL GAME Unspent cash earns interest between waves. Which means the strongest opening is often to build almost nothing and let your money sit there thinking about itself - sophisticated economic strategy, or an elaborate way to lose on wave eleven. Both outcomes are available, and only one of them feels good in the moment. REWIRE BETWEEN WAVES Clear a bonus wave and the game offers you a permanent choice: more damage, more range, more interest, or five lives right now, no questions. Pick one. It holds for the rest of the run. Neuroplasticity, in the sense that your brain is now permanently different and there is no undo button. Exactly like the real thing. WHAT IT DOESN'T DO No energy meter. No daily streak quietly conditioning you like laboratory equipment. No timer between waves - think as long as you like, the enemies are patient, being conceptual. No forced tutorials once you know what a tower is. One hand, one thumb, portrait. Open it, think, close it. Thirty waves. Eleven towers. One increasingly concerned nervous system.
Screenshots
Verdict
The clearest difference is ads: MDS at none against Synapse's shown. Synapse's advantage is update cadence (every 3 days vs monthly) and iOS requirement (15.0 vs 26.0). On price, in-app purchases 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
Both are free to download. MDS sells 7 one-off in-app purchases and Synapse sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
MDS ships an update monthly, Synapse every 3 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | MDS | Synapse |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 171 MB | 228 MB |
| Age rating | 12+ | 12+ |
| Developer | Bruce Mattison | Disquiet Studio |
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
Synapse
- Unlock All Maps$9.99
- Unlock The Cortex$9.99









