Here is the full list of all 998 Sky Jump achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Flag
simple person
National emblem
Black
Symbol
Dog
Gemini
Pisces
Cancer
Aries
Leo
Capricorn
Virgo
Aquarius
Libra
Taurus
Sagittarius
Scorpio
Letter
Number
Cat
Bird
Your teammate
Famous person
Lord of the hearts
[ERN] ░LEGEND░ [P-B]
Since 2013
steamcommunity.com/id/macnex
steamcommunity.com/id/lesseffort
http://steamcommunity.com/id/Lindsey_STOMP
Lindseeey
@TheKidd1986 and @Lalabama01
https://www.youtube.com/user/IAmPokerpo
Bavarian Achievement Hunter
Community Achievement
Lucky_13