While the microtransations aren't absolutely needed, it's ♥♥♥♥♥♥♥♥ to have them in a single-player game at all. You CAN get all the in-game money you need, in-game, it just takes a while.

Also, a lot of achievements are broken. There are a few that remain from an earlier version about areas that aren't accessible in the Steam version, for example.

It also gets boring very very fast. I guarantee after like six or seven quests you'll stop reading the dialogue and just click furiously to get through it (I didn't, but I know a bunch of people who had).