TurretZ is a weird mix between twin stick shooter, idle game and tower defense. I'm not sure which of these genres this game is supposed to be, but it isn't very fun. You have a planet in the middle of the screen with a whole lot of enemies around, and the planet rotates while auto-firing with various weapons, after you defeat a bunch of enemies, a boss appears. Defeat that boss, and you get to the next level, which is almost identical to the previous one. The planet is tough to control, your weaponry is unreliable, and progression is extremely slow, I didn't enjoy TurretZ much.
Wizard Swipe is an iOS game where you have to 'swipe' the screen to throw spells at waves of advancing enemies to protect your castle, using more powerful spells on cooldowns and upgrades to survive better. It started pretty okay, but the difficulty curve quickly ramped up to a point where I would have needed to grind too much in order to get further. It's too bad, since the game has a nice blend of challenges and upgrades so I wish I could've stomached to play some more.
Defense 2 follows much in the footsteps of its predecessor in the tower defense genre to bring you a game about protecting cores from aliens by building towers on their paths - sometimes even making the paths themselves. I had a good time with it, even if I was perplexed by some of its systems and had to tone the difficulty down to Easy in order to enjoy it. The story also kept me interested, which is a nice thing for a tower defense game where characters are usually not a huge presence.
Infested Planet is a neat little tower defense/action game where you control a bunch of soldiers and you need to complete objectives that most often than not involve destroying alien bases and taking them over while hordes of enemies move toward you. I had a good time with it, even if I'm not a fan of the upgrade system/general and that gameplay often felt confusing.
GemCraft is great, I remember the old days when I actually paid for the complete version of such a game on Kongregate, something that was unheard of for me back in that time - paying for flash games - but it's a nice tower defense game that might last you a long while. There's so much stuff in it and it all is based on solid core mechanics and titular gems. It's not an entirely flawless game, but after you get over some bumps in difficulty and some clunky UI, you'll have a solid game to keep you playing and unlock stuff, level, and get better at it.
Kingdom Rush Origins is an okay follow up to all the other KR games and it's entertaining enough as a tower defense title, albeit not saved by different towers, enemies and heroes. I suppose that's the main issue with these games; How do you keep making them and keep making them feel fresh and new? There are some things they could do, like add more tiers of tower upgrades, or tweak the hero system, or change the powers you can use, but it doesn't mean that KRO isn't fun to play. It just doesn't feel very new.
Bloons is a bit weird in the tower defense genre. You don't go through a specific set of maps, instead you can attempt any of them at any difficulties you've unlocked. You unlock better towers with a global level - and then you buy them during maps with cash you get from popping balloons. Some of the maps are weird and there are so many towers that it feels a bit like diluting the overall use of each types. I still had a fun time with it, but the lack of a clear progression made me stop after a while.
Space Run is a tower defense game where enemies go to you as you're flying a spaceship trying to deliver thing under time constraints. It's a fun game where the tower defense gameplay loop of having a list of things you can build allows you to complete maps not perfectly, but well enough to buy better things later on in order to go back and finish stuff you couldn't do before. It's also very interesting with the way it deals in tower construction and enemy waves.
Metal Slug Defense is not entirely hot garbage, but there is better to be found in the realm of defense games where you get resources constantly and build units to push towards an enemy base that you destroy. Two things that annoyed me right up top? Full-screen ads on the mission select screen and full-screen ads right after you've completed a mission. No matter how fun or charming a game can be, having a video ad for some other game block your device is awful.
Sanctum 2 is way better than Sanctum 1 was. I remember vaguely playing the first game, unbalanced weapons and towers against quickly impossible missions, things of the sort. This second game adds much to discover with level-gated weapons, towers and perks to equip to different characters in order to blend the genres of tower defense and first person shooting once again. I'm a big tower defense fan!
There is not much to say about Demons vs Fairyland as it reminds me of many other tower defence games with a few things thrown in there to try and change the basic gameplay structure. I can’t say that I’m a fan of some of these things and while playing on easy, I’ve found the game too difficulty - a fact that is only exacerbated by the pay-to-win items you can buy.
There rarely are games where you control obviously French Canadian lumberjacks fighting werewolves, especially with tower defence elements thrown in there for good measure. Sang-Froid: Tales of Werewolves has a neat concept and some interesting elements surrounding the core gameplay, but the act of actually playing it feels clunky and not very fun, so I couldn’t get very far into it.
Castle DoomBad is a tower defense game where heroes infiltrate your towers via the main door and windows to try and rescue a princess to bring her out of the building. Your job is to build traps and summon minions to kill the heroes before they reach her glass cage. Yes, there are two currencies and one is more premium than the other one, but I never even felt the specter of microtransactions ruin my fun.
Steampunk Tower is a perfectly competent tower defense game. Instead of building towers, you place turrets into a big tower standing in the middle of the battlefield. Enemies attack you from left and right and you can move turrets around to upgrade them or to reload ammo. Enemies are weak against some type of turrets but strong against other, forcing you to build a wide array of defenses, you can upgrade them between fights, using oh-so-precious dollars. It wasn't the best tower defense game I've played, but I enjoyed it.
Ironclad Tactics is a card-based strategy game, you build a deck of twenty cards from two factions, featuring a mix of Ironclads (strong robots that can equip parts), tactics, parts and infantry (lighter units that are useful on their own), you then take this deck through a multiple of scenarios where the goal is mostly to get your ironclads to the end of the screen to score Victory Points, some missions require you to kill a boss or survive, but most of the time you'll use multiple ways to gather VPs and win. You get AP every turn to use your cards and some maps include ways to make AP faster. I've felt disappointed by IT, but I loved it.
Here is a nice paragraph. Plants vs Zombies 2 is an incredibly polished, well-made game that builds upon its predecessor with new zombies, new plants, new level types, a map-based progression system that allows you to unlock upgrades in the order you want, power-ups and boosts to help you defeat difficult challenges, endless maps to try and tackle and the same addictive gameplay that made PvZ so good. All of this, and more, if you're willing to stomach tons of f2p Junk.
CastleStorm is a weird mix of Angry Birds and strategy RPG elements. The goal of most levels is the same; to destroy the enemy's castle. To do so, you fire projectiles, spawn units, use magic and try to complete special objectives to gain more money and more stars. The game has some fine ideas but it's a bit unsure of what it wants to be and so it doesn't do anything particularly well.
Kingdom Rush: Frontiers is an amusing tower defense game with enough customization options and neat little gameplay elements that makes it worth the 3.99$ price tag but also tries to catch IAP money through some other means that I can't say I care much about.
Prime World Defenders is a tower defense game with some RPG elements such as leveling up towers and collecting items to strengthen them, getting experience to unlock talents and grinding to get more gold and levels to be able to beat the most difficult ones. It required too much grinding for me.