Today there is a great interest for all sorts of idle games, but neither can race with guild dungeons. Apart from gaining visual display of your progress, the battle system is complicated enough to be not only just another way to generate silver.
the game is mostly "underrated" because the arena system. The arena system takes one hp from your deck every day, if you don't renew it. Howewer, the weakened decks are still in the play, thus players can encounter them, and win. A new version is in the making (called open ETG), with unfinished graphics, design, and code.
This game is done really well, and it's replayability is legendary. The first part was inspiring, and the second one is also writing history of turn-based rpgs. The developers used the wow sprites very well, adapted spells, locations, and also managed to set up a good story and gameplay. We can surely say both parts got challenging, and tactical parts (skirmishes, permastun enemies), and only the expansion is suffering some excessive grinding from 15 or 16 to 20. Today these aren't great words, but when this game was made, such improvments were new and coding was rough. This is a timeless masterpiece!
actually a third part actually was made, and it's first three chapters are playable, but the developers gave up. It uses pentagons instead of 1/4 of tower's tiles, and has extreme graphical improvements. It has a new hero system,and those heroes give nearly 40% of your defense, so it changed a lot.
use a demon tower at the very beginning to tigger ninjas, it will fast trigger the biggest swarms, and then you can damage them with all you got. wrote this in 2019, the game came out in 2013. lol.
 "Guild Dungeons 2"){kind=icon}
 "Halla"){kind=icon}
 "Sonny"){kind=icon}
 "Elements"){kind=icon}
 "Murloc RPG: Stranglethorn Fever"){kind=icon}
 "Cursed Treasure 2"){kind=icon}
 "Morningstar"){kind=icon}