After the recent update i actually find it worse. I could at least get three or four rounds out before refreshing to get rid of lag now i cant even get one. Finding the third map impossible to do as im not jumping over holes at all
Completed game without even unlocking a single special or coming anywhere near close to being able to afford one, without buying cash there is no way you could unlock everything.
Badge 5:22 just done it on about 30th attempt. Get treasure with spell casters, return them to defend build 1 mine 2 farms, 2 spears 2 spell casters, move to nearest keep and take, get treaure just north of keep. Buy maxed out gunbots and cavalry to replace all dead and those under the influence of the enemies ulti. send 2 gunbots south and 2 north with 1 cavalry each. Worked best for me. Though by far the hardest mission! (notice the other 2 campaigns last missions had 2 teams so they could battle it out on the Icedales.. its just you and undead)
The achievements seem to relate to having long battles (3k gold 7 farms at once etc) yet the objective is to rush the maps. After getting all 3 stars on every map i only have 16 'badges'. Maybe relate some of the missions to the badges ... 3 stars if you collect 3k gold in this map' etc.