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Royal Defense: Invisible Threat app for iPhone and iPad


4.0 ( 6560 ratings )
Games Role Playing Strategy
Developer: 8Floor
0.99 USD
Current version: 1.1.6, last update: 7 years ago
First release : 08 Feb 2013
App size: 143.5 Mb

The castle needs a hero – hordes of trolls are surrounding it!

Build towers, save money, learn spells, and keep the enemy away! Follow the exciting story of the dwarven kingdoms eternal struggle against the troll hordes, who want only to crush the dwarves and claim their territory. To defeat these monstrous hordes, you must construct defensive towers and units and learn to wield powerful spells. Tap anywhere you like for a handy pop-up menu listing all the units and structures that can be built in each location. Tap existing structures to see how you can upgrade your forces with powerful improvements! All your towers and units have specific stats: Damage, Fire rate, Damage radius, Damage type, as well as various other features, such as Enemy Slowdown and Damage Over Time. 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!

Pros and cons of Royal Defense: Invisible Threat app for iPhone and iPad

Royal Defense: Invisible Threat app good for

Could be a 5 star game with more levels. I completed the first campaign but theres no way (and no instructions) to access the 2nd?
Why is snowfall mountains locked? I finished forgotten fields with all 3 stars but, snowfall is still lock, it this a bug ??? How do I get to play/unlock snowfall mountains ??????

Some bad moments

To progress on a three star basis you need to buy extra power via In Game Purchases. This is not how this should be. There is no encyclopedia of friends and foes so you only have the notes provided when a monster appears for the first time. No information on monsters when you tap on them in the action. No there is also no reset button to undo your power ups or your character so you can start again and use a different strategy or ratio of power ups .
Game has so much potential but plagued with bad patch releases. Not worth .99 at all. No way to continue upgrading the towers once your done so when its over its over. New patch death bone cant even play it, says you have to purchase it but you cant. Im done having hope in this game. Take example on kingdon rush and release a finished game pls.
First two campaigns are fun. Then the third one requires you to buy gems... Ex.level 3-1 has 5 out of 14 emplacements locked...PC version has 1.
Fun TD but wish more levels/campaigns were available. Looking forward to future updates. I have an iPhone 5 bit didnt experience any problems that were cited in other reviews.
So the defense and the monsters are really nicely designed however the towers need a little more upgrading for example for the first tower when you upgrade it to the last level it should have some effect upgrades like idk splash slow or instant death some nice effect would make this a very very nice defense plus u guys need stronger monster its really easy and for people complaining that sometimes u dont even have enough money to build a tower its a strategy game morons thats something u need to figure out how to get money . Anyway I loved it worth the money keep it up guys
Although Ive had fun playing this game I dont feel its worth the $3 I payed for it because many of the levels are glitchy, sometimes I will start a level with about 100 gold and then ill restart that same level and have 0 gold to start and randomly receive the 100 gold I shouldve had at the start after I lose half of my castle life. Very frustrating.