It's now 6 days left and the pledges are really filled with good stuff. We are almost halfway to the third stretch goals.
Last stretch goals unlocked with:
2 smaller viking huts, 2 viking wagons, buildings without a stone foundation (for the poor viking)
Ruins for the sci-fi armored barracks, Even more greebles, Bunker endpoint (no door, just a lot of firing windows)
Next stretch goals soon unlocked with your help:
2 gnarly trees (one with a lookout platform), Viking building T-shaped section
Sci-fi barracks 4-way section, sci-fi fuel depot, sci-fi concrete ground