Ergh... What?
Translations aren't even checked, and it's just like they took the mobile version and deleted the prices, for example, to unlock some stage it says something like "gather xxx stars or buy it for . " Not sure how the mobile version was, I mean if you could buy currency or something like that, but having to gather gems grinding stages shouldn't be a thing on TDs.
Very basic, feels like a weird copy of a great tower defense like Kingdom Rush. If you played it already, don't take this as a way to calm your hunger for similar TDs.
However, the price is alright on sale, if you don't have high expectations and you are new to this genre, maybe you should give it a try.

a casual tower defense game, with some problems :
-- no keyboard shortcut. (no 'space' to pause, even hitting 'esc' will be ignored)
-- tower's ai is sometime stupid. (eg: it won't attack enemes that closer to castle)
- mediocore graphics & sounds, repetitive music.
- 'follow the exciting story' ... what story?
- right click = left click = execute =_=

if you can handle that, the gameplay quite challenging. (on hard difficulty)

TL;DR review: An ok TD, not great, not terrible. Ok graphics, ok mechanics but sometimes frustrating. Like the stages where it gives you no starting money and the enemies that sleep your towers (that have no clear counter other than hope you can select them / hit them in time)

Decent TD worth the money.

It's quite basic, standard towers. It's fairly well done, the design is nice, the balance is good (not too easy not too hard) you can get various perks by playing and customize your play style a little bit. Not overly complicated, an easy play, worth a few bucks, I've certainly enjoyed it and at the time of this review I'm 2 hours in, already worth the money and I plan to put more hours in.

It's a good tower defense game. For every kind of player casual to hardcore . For 6,49 CDN$ this game completely worth it. I played already 5 hours to complete the game on easy and i have only the act 1 and 2 completed. If u want a really good challenge you can play hard mode and heroic mode and your game will be longer than 10 hours i would say at least. Some fight are really hard and others are really easy. It will not be easy for most players to reach 100% of the achievements because u need to put some time into the game for it.

I would give it a 3.5 out of 5

Sorry if my english was bad and i hope you will enjoy this game

Melovia

Mobile Port = YES
Grind = YES
no IAP = Good
Is it a challengening TD = YES

If you are a TD game addict then get it, as it is fun!

7/10

I'm going to recommend this game, allthough there are plenty of things I'd like to point out first. As in the description of the game,

Follow the exciting story of the dwarven kingdom's eternal struggle against the troll hordes, who want only to crush the dwarves and claim their territory.
^ After having played this game for seven hours, I have never been introduced to any shape or form of story.


Unique units, a wide range of structures, spells, gold and various resources make this game that you will return to again and again.
^ Nope, nothing unique. It's your typical TowerDefence game with the typical towers. Nothing new implemented.


Tap anywhere you like for a handy pop-up menu listing all the units and structures you can build in that location. Tap existing structures to see how you can upgrade your forces with ever-more powerful improvements!
^ This hints towards that the game description is the same as for the mobile version.


Each level also brings new units and structures to help you fight the troll menace. You’ll never be lacking for new and exciting ways of decimating those nasty trolls!
^ Sure, it does vary this, but not nearly every level as this description claims.

- 60 different progressively challenging levels
^ True

- 3 unique game settings
^ If they mean the difficulty settings? Then sure, but I'd hardly call having Easy - Medium and Hard options unique.
EDIT: ^ There are three different biomes. Forrest, snow and desert.

- 17 kinds of creatures
^ As with every other game, lots of reskins.

- 12 kinds of towers and structures
^ True. Also very basic for most TowerDefence games.

- Extensive magic system
^ Can't think of a more basic system ever implemented. Nothing extensive about this.

- Various upgrades
^ Pretty fun to upgrade towers and such. Pretty typical to TowerDefence games.

- Fascinating gameplay
^ Facinating gameplay, what does that even mean?

The game lacks keyboard support, which is a huge nuisance to me as a PC gamer. Obviously this is due to the game being ported over from the mobile version.

Lacks a options menu. Two volume sliders isn't an options menu, however the ability to toggle between fullscreen and windowed is a good addition.

The game only has three soundtracks that loops. Hope you have a playlist on Youtube or Spotify ready.

So with all of this, why am I recommending this somewhat discount Kingdom Rush clone? Well, as far as a Tower Defence game goes, it handles more or less as you'd expect and it's not bad at what it does. It doesn't do anything unique or great, but it's still solid for killing a few hours of boredom.

https://www.youtube.com/watch?v=otkeVPxTeMY&list=UU7_-PLIhjsEBwIQXqKxmNpA&index=2

Royal Defense is a tower defense game, originally created for mobile
play. One thing this games succeeds in was eliminating the microtransactions,
and transferring those gems into rewards to use towards upgrades. While there
could have been more balancing done when it comes to cost of upgrades versus
number of gems dropped, overall this added to the quality of the game, rather
than take away.

There is an abundance of content in the game. I especially enjoyed the
heroic mode, as you had to complete it without upgrades, and relying on your
skill solely. Unfortunatelly, the heroic mode was only on tier one, and I felt
it could have benefitted from having it on the other tiers, as well.

There is enough variety in the different levels you see that keeps the
player from becoming bored from repetition. The pathways of the levels as well
as how the enemies react to the players towers was done very well. The core
design of the game is solid, and while I felt that the graphics could have been
updated a bit to compensate for being on a computer screen, the music and variety
combine to make a challenging and interesting atmosphere.

The locations of the towers that can be built are marked clearly on the
map, as well as extra plots available throuh spending your gems. These extra
spots aren't required to purchase, but they offer variety for those looking for
an extra challenge, as well as an option for those who are struggling. The
combat is fluid and the AI is done well, so you never feel as though you are
fighting an uphill, neverending battle.

I didn't expect to have as much fun as I did playing this game, and I
found myself playing this for longer than I anticipated. It has a few small
iussues, but I never felt disrespected or unappreciated. I can easily
recommend this game for those that enjoy a good tower defense game.

This is a summary of my review video, which I encourage you to
watch if you are looking for a more in-depth review.

Thanks for your viewership and support; for more videos check click here.

http://www.youtube.com/user/SocioPyscho

Mac OS X user's rejoice!!! The previous reported Mac OS X problems regarding additional gems not dropping and no difficulty settings have been fully addressed and fixed!

I can now FULLY recommended Royal Defense to all Tower Defense junkies! Gems now drop plentiful and there are 4 difficulty settings for every map of the three campaigns! KUDOS DEVS!!!

My full review pending play through! Just know this game has some of the best maps I have played in a TD game! It's fun, has a great selection of towers, upgrades and enemies to slaughter!

Thank you again to the dev's for listening and fixing the problems so fast. Sorry for any missed Mac OS X sales, but the game was simply unplayable before the fixes! Thanks again! :-)

This is a fun little tower defense. Seems to be a partial knock-off of Kingdom Rush and a couple other titles. Either way I really enjoy it! Really enjoy the grind aspect to upgrade towers and spells. For this price, you really can't go wrong.

This would be an ok $0.99 app for ios or android. But for a $6 USD "finished" steam game, it's really terrible.

Lets start with the basics. It's a tower defense game.

That's about where it ends, because this game is nothing BUT basics. Fast starting arrow tower, slower AE ground tower, etc etc etc... it's just the same old thing you've seen a hundred times if you're a TD player. But then you get to see the bad aspects of the game. Spelling errors abound. Graphic gliches where a 'bridge' intersects with the road. Graphic bugs that cause the game to either crash, or constantly spam the screen with 'acheivments' (which block your spells). Poor choice of starting cash leading you to be forced to grind early levels to upgrade towers. Spells that just are very underwhelming.

I'd say if this game drops below $1 USD AND you like very typical iOS / android app style tower defense games, go for it. But otherwise skip this one. It brings absolutely nothing to the table other than a vanilla TD with notable flaws.

Not quite balanced or polished for a turret defense game. Gets boring quickly.

Just a typical tower defence game. OK to spend for $2 to mix up with your gaming routine.

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It doesn't have much polish but the gameplay is easy to play and straight forward which is good.
I'm not a fan of this genre of art, it is popular because of tablet and android games but quickly getting dated.
I do like the gameplay. This is a great game to play while in que in another game

I like that it's quick to start playing. You can just jump in and out.
.I'm suprised it came out this year, the graphics I've seen on every title in this genre are too often dissapointing. I mean come on my tablet will run Assasins creed Revelations, why cant we get awesome graphics?
I have yet to see a desktop defense with kickass graphics.I want one.

On a side note, this is a perfect all mouse only game to play while eating a Hogey!!!

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casual it is

This a mobile port, so keep that in mind. The levels can be quite challenging, and you unlock more and more towers as well as the ability to upgrade them as you play. You will also receive a separate shop, where you can purchase passive abilities that will help out the damage, range, etc. of your towers/spells (this shop requires a separate currency). Typical kind of tower defense, quite fun.

However my main gripe would be the upgrade system that involves a separate currency, which appears randomly in each level. Sometimes you'll get 5 of the currency in a single level, other times 0 (zero). The upgrades that require this currency also increase in cost every time you purchase them. This will require you to replay previous levels constantly to grind out enough of the resource to pay for the upgrades.

There are 3 difficulty settings though: Easy, Medium, and Hard. The only problem is that defeating the level on "Hard" does not give you credit for the previous 2 difficulties. I guess it gives more incentive to farm the currency required for the shop upgrades.

Not bad for its price, but I also bought it on sale for even cheaper. Was worth the 2 or 3 bucks I spent.