Terrain terrain is completed to 98%. Only very phew areas aren't done yet and they will not be used until the very end of the game. In order to embody a bit more this project, I'll start triggering instead of finishing the terrain.

You can travel through it, but you'll probably get stuck somewhere. The terrain is intended to be followed through a very specific trail and going the wrong way at some places might force you to rehost in order to continue your exploration.
It is suggested to explore all the areas deeply before trying to enter into something that seems like a door.
Also, some areas are skipped due to reasons I will not tell you. =)
Note that the forest part is supposed to be travelled with the blind zergling and only them. Once you've past it, use the civilian that you will face.

Moreover, it isn't really recommended to look at this map since it spoils some features/puzzles/terrain.
If you play it alone, you will not be able to solve the puzzles.

Production thread.