Here is the full list of all 20 RUGBY 15 achievements worth 1,000 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox One.
Score a try.
Run and score a try directly after breaking out of a tackle, vs CPU. (Hard)
Score 4 tries in a match, vs CPU. (Hard)
Score a penalty goal or conversion from 55+ meters, vs CPU. (Hard)
Score on 5 place kick attempts in a row during a match, vs CPU. (Hard)
Punt into touch for a territorial gain of 50+ meters.
Successful lineout by human-controlled players on same team.
Score a goal from 40+ meters.
Score a try after running the ball directly from behind your own goal line.
Do not concede any penalty infringements in a match
Win 5 ruck turnovers in a match, vs CPU. (Hard)
Win a match against an international team rated 90+, vs CPU. (Hard)
Score 10 tries in a match, vs CPU (Hard) in 5 or 10 minute halves.
Win 10 matches in a row vs CPU (Hard) as the lead controller.
Win the AVIVA Premiership title.
Win the Top 14 title.
Win the Pro D2 Title.
Win the RaboDirect PRO12 Title.
Create and win a competition in Custom Cup featuring 20 or more teams.
Get awarded two yellow and/or red cards in a match.