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