Here is the full list of all 23 RUGBY 20 achievements.
Win the Nations’ Trophy
Win the Top 14
Win the Pro 14
Win the Premiership
Win the Pro D2
Win a match by taking the lead with a drop kick in the last 10 min
Finish a match without committing a foul
Win a match without scoring a try
Win a match after trailing by 20 points
Score a try with a set play
Score a try in the first 5 minutes of the match
Score a try after the siren sounds
Score a try after a grubber kick
Catch all line-out throws during a match
Pull off 5 set plays during a match
Kick the ball outside the 22-metre line from the in-goal area
Perform a turnover in a ruck
Hook the ball back after an opponent feeds it in
Move up a division in solo mode
Fully upgrade staff in solo mode
Reach an elite division in solo mode
Buy a player
Train a player in solo mode