Here is the full list of all 12 UNO achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
Win Wild Draw Four challenge 20 times.
Win 5 matches against 3 AI.
Successfully Challenge a missed call UNO 15 times.
Win 10 Online matches.
Win a match with more than 700 points.
Win match 5 times with at least 3 house rules.
Win the First UNO match.
Successfully Calls UNO 10 times.
Change Color with Action Cards for 40 times.
Play Action Cards 100 times.
Successfully make opponent draw cards with Wild Draw Four 10 times.
Complete the First UNO round.