Here is the full list of all 50 Rugby Challenge 3 achievements.
Win the Elite 12 Competition
Use a number eight pickup in a Fifteens match
In Fifteens Pro Career Mode, accept a contract from a team in a lower competition tier
Create and save a custom player with a tattoo on every limb
In Fifteens Pro Career Mode, get selected and play for international duty
Share a custom player or team
Intercept a pass and score with that player
Complete a Fifteens Pro Career Mode while sticking with your starting club
Get promoted to team captain
In Fifteens Pro Career Mode, accept a contract from a team in a higher competition tier
Win the Buildcorp National Rugby Championship
Maintain over 80% possession in a match
Complete Coach Career Mode
Complete Pro Career Mode
Download a custom player or team
Create and save a custom player
Successfully hire a player rated 80 or higher for your club in coach career mode
Get gold medals in every tutorial
Watch through the credits
The ref calls a yellow or red card against you
Win the cup for every tournament in the international Seven-A-Side Series
Win the World Championship Competition without losing or drawing a match
Break through a full back with Jonah Lomu
Grubber kick the ball between the goalposts during a match
Use the "send runner" strategy to gain more than 5 metres past the ruck
Successfully steal the ball at a breakdown before the ruck forms
Create and save a pro player
Use a shortened lineout in a Fifteens match
Score a try in a Fifteens match within the first five minutes on the game clock
Maintain over 80% territory in a match
Score a try in a Sevens match within the first minute on the game clock
Complete an online match
Do not concede any penalties in a match
Win the Super Rugby Competition
Win the Quad Nations Compeition
Win the AVIVA Premiership Competition
Win the French Division 1 Competition
Win the French Division 2 Competition
Win the ITM Cup Competition
Win 60% of lineouts in a match that aren't thrown by your team
Score 4 consecutive tries in a match with Jonah Lomu vs England
Make a try-scoring run which starts within your own in-goal area
Score a penalty, conversion or drop goal which bounces in off the goalpost or crossbar
Score a drop goal with a prop or hooker
Score a conversion on pro difficulty
Win a match while 2 players have been sent off
Become the goal or play kicker for your team
Complete all goals in a single Pro Career match
Win 10 matches, each as a different team
Rate 100 custom players or teams