This expansion introduced two ned factions, a new campaign, flying units, improved Co-op experience, and more. Honestly the store page for the game/expansion does a good job explaining just how much content you'll get from it. So yeah, a properly done expansion, and if you liked the base game I'd consider it a must buy. -------- Note: As of writing this review, you can't play the base game's campaign from Soul harvest's client but it's "Coming soon" , so if you want to play the base game with the improvements from the expansion you'll have to wait a bit longer.
OK this is going to sound weird, but all I can do is share my personal experience with the game. It's like the best tower defense game in recent history just without the towers or the defense. Uhm, OK hold on, but what does this supposed to mean? Well, for me at least the game scratches the same itch as a TD game. Every level feels like a puzzle where you try to figure out the best set of moves and the best skillls to bring/upgrade, just as how in a TD you'd try to figure out the best combination of towers for the current situation and which one of them you should upgrade. The game also has an almost identical progress system to what you can find in Defender's Quest (<- a really amazing TD game). You don't have to beat stages on hard difficulty right away, you can return to them any time you want and try to either clear the bonus objectives for addition rewards or try to beat stage on harder difficulty. Hitting the word limit, so yeah just pick up the damn game, it's great! :)
I just finished the game, I have to say that I was pleasantly surprised. It looks great the combat is fluid and as you progress you unlock more and more moves/abilities so you'll have a lot of tools to deal with enemies. I've beaten the game on Apocalyptic, and I'd recommend this difficulty mode for anyone who is familiar with hack and slash games. The story was engaging it was told with no words wasted. Pretty much the only thing that I didn't like that nearing the end of the game there were some time-consuming puzzles, meanwhile I liked the break between combat, they were a bit too long for.
