There are a couple of decisions you can make, like what starting powers you want for your character, and which character you choose, but everything else seems like it is already predetermined or random.
If you don't explore edges of the cavern, you get an encounter card. If you do explore the edges of the cavern, you reveal monsters that attack you first (I suppose you sometimes get to determine which player the monster attacks).
Choices for which Item/Daily Power are equally as obvious (the weapon with the highest chance deal damage). Perhaps the only choice that requires any kind of difficult decision is when to use your Daily Power.
Am I missing something, or is there little if any strategy/tactics in this game?