General synopsis of the game:
This game is actually surprisingly deep once you figure it out. It tricks you into thinking its just a roguelike dungeon crawler. And if thats how you treat it, you will not last past the first floor. It centers around exploring each level room by room, and once you locate the exit to the level, moving your power source to the exit. You have to place your heroes tactically (at choke points basically), and build defenses around those heroes to harden their key positions around your power source. This usually leaves only one hero remaining to explore. Enemies spawn in random unpowered rooms you have discovered. So, sometimes one of your heroes may get overwhelmed, and you will have to take advantage of the handy pause feature to make sure one of that hero is not getting totally butt-r***ed. And, if he is, then you need to figure out which hero you can send to reinforce him. Or, you can activate one of his, unique to each hero, cooldown skills. Which will give him a temporary boost in combat. Or, you could order him to run away. Fleeing is always a viable option in this game. The in-game currency revolves around entering new rooms. For each new door you open you get a set amount of resources and/or currency which allows you to build extra defenses, hire another hero, level up your existing heroes, research better defenses, heal your heroes in combat, power new rooms (to set up new defenses), or buy new gear for your heroes. Once you have opened a door, you cannot close it. So, you have to be careful not to expose a flank route to your power source by brainlessly opening doors.
Thats kind of it in a nutshell. I obviously recommend it, even in its alpha stage. It has not crashed once for me, and is pretty content rich. I can't wait for the game to be content complete.