I'm heavily conflicted with Royal Revolt 2. It's a little too heavily laden with the temptation of in-app purchases, lengthy timers, and exactly the kind of elements that put many off trying freemium games. And yet I still had fun with it, even despite such restrictions and an avoidance of spending real money.
It's a reverse tower defense game. Instead of defending one's castle or village, players control the attacking force. A hero leads the charge with other soldiers such as warriors, archers, and paladins follow behind, attacking structures in their way. Working on PvP basis, players fight it out against other real people across the world. This means that one also has to build up their defenses, while not directly controlling such things. This is also where the timers come into play quite significantly.
Much like with various city or village building games, structures such as farms, taverns, and throne rooms must be upgraded steadily in order to gain new items and bonuses. Each is linked to the others so there's no way in which to have a level 5 barracks but a level 1 throne room, for instance. Building takes time and money, both ensuring that progress is a little slow going and also giving one a reason to fight other players. It's oddly addictive though, despite being very familiar.
Building one's defenses is more than simply a matter of hiring troops; it's also possible to create a maze like path to one's estate. It's fun to traverse other players' mazes too, taking out their defenses one by one.
Royal Revolt 2 runs the risk of repetition at times and it could do with more content in the long term (those mazes are far from long) as well as a more forgiving timer system, but it's still oddly beguiling. For the more patient gamer, this will suck up their time in predictably small bursts. It's just a pity that it ultimately feels so restrictive.