You can follow the Steam release here https://goo.gl/q6rSCC
It features achievements, highscore leaderboards and speedrun leaderboards.
Release date: 22 December 2017
Thanks. Yes, Sigi is coming to Steam (and Xbox One), with achievements and leaderboards, hopefully around Xmas.
Super addictive game, this will drive you nuts! Excellent gameplay.
Had to give up though at level 8 after trying like 150 times.