Win the master league to unlock new players that can be signed. Note: This can be done up to three times for more players. Also, complete all the training challenges.

Play as England and win the European Cup.
Play as Holland and win the European Cup.
Play as Germany and win the European Cup.
Play as Brazil and win the American Cup.
Play as Argentina and win the American Cup.
Play as a European team and win the International Cup.

Win the International League.
Play as Italy and win the European Cup.
Play as France and win the European Cup.