NoblestSteed said:If the stars aligned, it may be possible to complete the game in one playthrough, but that is definitely not what I'll be recommending.
Understand completely. One of my idiosyncrasies is to always start and play a game on the highest available difficulty. Another is to avoid mop-up and, whenever possible, complete the game in a single playthrough. I understand that usually means a less efficient and more time-consuming approach to a 100% completion.
There are three primary factors that could make it impossible:
- Two difficulty related achievements, one for Tactician and one for Honor mode. I've read several posts that playing on Honor mode won't unlock both achievements, but there are others that confirm that. I'm currently playing through again to verify that myself.
I wondered about that myself. If Tactician does not stack with Honor, that forces a minimum of two playthroughs.
- Two ending achievements are somewhat mutually exclusive. On a base playthrough there are two ending choices that result in an achievement each, but one of those options is replaced by a different version for another achievement unique to The Dark Urge origin. Technically could work around it if you timed cloud save correctly as the decision that locks that in is late Act 3.
- Playing as The Dark Urge has a high risk of voiding the "Save all the Tieflings" achievement due to a series of events, so attempting that on Honor mode would be a bit of a gamble for those not savvy with cloud saves.
I'm very savvy with cloud saves and I'd be willing to take the gamble.
That said, if it is possible, definitely not something that I will base the guide around. I might have a call-out section for that though in case someone does indeed want to attempt it if it proves technically possible.
I ordered the Physical Edition which, as I'm sure you know, has not been released yet. So, I'm a ways from playing the game. If a one playthrough approach is possible, that is, definitely, what I'll be going for. I'll have to have a rock solid road map for the achievements to ensure I don't lock myself out of obtaining a missable.