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