Despite the Kraken producing 100% a month the suck a tentacle achievement is not triggering.
This should fire if the yearly production is over 70%, but obviously it is not. Can you share your savegame?
I've uploaded a savefile to https://github.com/Cousjava/simutrans-savefile
EDIT: I have also tried validating the game on steam and playing, still no achievement triggered.
Fixed in r11775. The calculations were not wrong but the factory name had changed internally from "squid" to "Mr. Kraken", and that prevented the achievement from firing.
You may be able to test it, tomorrow, if you switch to the nightly branch on Steam.
Tried the nightly, got achievement instantly upon loading up game.
Good.