pyramida · Speedrun achievement, in 17 days (raw gameplay)
The Speedrun achievement require to "Beat the game in 20 days".
My tactic was to build the less building possible and to micromanage my settlers.
I started by looking for the Alien and to scoot for stone next to the pyramid. If you don't have much stone, I suggest reloading the save. I built a log shed, a house and an archer hut as soon as possible. I also gathered some berries. My main source of food was from hunting, it's a bit random but efficient. Doing so will also reward you with the Hunter-Gatherers achievement.
After that, I had 5 settlers (6 with the Alien) and did everything with them. Having more people will require to gather more food, and I didn't had time to do so. Next I built a sawmill, a mine camp and a masonry. That's all.
You will have to manage your settlers efficiently by asking them to take the shortest path possible. I tried to fight skeletons during the night and to hunt with always 5 hunters. If the antelope are too far away from your town center, don't hesitate to gather berries instead. My last advice will be to keep an eye on your resources and to only gather what you need, don't spend time on resources you don't need. Also, have fun :)
Twitter : @neueSHAUNI.
Recording using OBS Studio.