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.
Successfully make opponent draw cards with Wild Draw Four 10 times.
Win the First UNO match.
Complete the First UNO round.
Successfully Calls UNO 10 times.
Successfully Challenge a missed call UNO 15 times.
Win match 5 times with at least 3 house rules.
Play Action Cards 100 times.
Win 5 matches against 3 AI.
Change Color with Action Cards for 40 times.
Win Wild Draw Four challenge 20 times.
Win 10 Online matches.
Win a match with more than 700 points.