For those of you achievement moguls who don't feel like sweating out two long seasons, I'd suggest this as an easy way to unlock the achievement for winning the league title twice in a row. Go to 'Team Management' in the main menu and select 'Transfers'. Select a team from a first tier league that has low ranked teams overall (such as the MLS) and transfer players into a team in that division (this will be your manager mode team). Spend about five minutes transferring over top players from notable teams to fill your roster with at least 7 top players in every position, and two goal keepers.
For example you can use:
GK:
Iker Casillas (Real Madrid)
Julio Cesar (Inter Milan)
DEF:
Dani Alves (Barcelona)
Carles Puyol (Barcelona)
Maicon (Inter)
John Terry (Chelsea)
Nemanja Vidic (Manchester United)
Philip Lahm (Bayern Munich)
Sergio Ramos (Real madrid)
MID:
Kaka (Real Madrid)
Michael Essien (Chelsea)
Frank Lampard (Chelsea)
Steven Gerrard (Liverpool)
Xavi Hernandez (Barcelona)
Esteban Cambiasso (Inter Milan)
Diego (Juventus)
Andrea Pirlo (AC Milan)
FWD:
Cristiano Ronaldo (Real Madrid)
Fernando Torres (Liverpool)
Zlatan Ibrahimovic (Barcelona)
Lionel Messi (Barcelona)
Robin van Persie (Arsenal)
Didier Drogba (Chelsea)
Wayne Rooney (Manchester United)
You may have to transfer out players that are currently on the team along the way to make sure the roster is not completely filled up. Next, once you have your team stacked with top players such as the ones mentioned above, transfer out all the other players that were on the team.
Now save your rosters and go to 'New Manager Mode' and select the team you transferred all your players to. Turn off auto save to make the process go by quicker, and just simulate every game. You should be winning almost every game. Once you have the money you can upgrade your teams fitness level as teams in these leagues usually have a poor fitness staff, leading to the tiring of your players. After playing through the league for two seasons you should easily unlock the 'Double Champs' achievement, not to mention likely 'The Treble' and 'Established' achievements aswell.
