To unlock the Landrush events, you will first need to complete 4 different events in the Rally category. Once it's done, you will earn the license that will allow you to play in Landrush. Complete the available events to unlock other events, until you're able to play the last event which will be the Landrush World Series. Once a new set of events is unlocked, you don't have to beat the remaining events in the previous one if you don't want to. While progressing through your career to unlock the last event, you will also earn
The Landrush World Series has 5 events and every event consists of a semi-final and a final. You will need to finish the semi-final at least in the 4th position to get a chance to play in the A-final, then you need to win the final in every events to get the trophy.