Here is the full list of all 45 F1 2015 achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Complete a race in Pro Season mode.
Drive a total of 78 laps at Monaco in Pro Season mode.
Drive 500 laps on European tracks in any game mode.
Set 50 clean laps at Sochi in Time Trial in a Marussia.
Complete 200 laps in Quick Race mode.
Stay out in 1st place for 150 laps in Quick Race mode.
Complete 50 clean laps in Quick Race mode.
Spend 180 minutes in total track time at Silverstone.
Achieve the most poles within a Championship Season.
Win the Drivers' Championship in Championship Season on any difficulty.
Win the Constructors' Championship in Championship Season on any difficulty.
Get 14 wins in a single Championship Season to beat Michael Schumacher's record of 13 wins.
Win the race from 22nd place on the grid in the 2014 Championship Season.
Meet or exceed a race objective given to you from the team in Championship Season.
Get a podium in Championship Season.
Complete a Championship Season race without colliding with another car or object.
Take pole, win the race, set the fastest lap and lead every lap in a Championship Season weekend.
Win a race in Quick Race, Championship Season and Multiplayer mode.
Drive at least 20 laps on a track in each continent, in any game mode.
Take pole position in Championship Season.
Finish ahead of your team mate in a practice session in Championship Season.
Take 10 poles in Quick Race mode.
Load a Mid-Session Save.
Score 75 Constructors' Championship points in Quick Race mode.
Win 3 races at Monaco in Quick Race mode.
Spend at least 600 minutes out on track.
Set 50 clean laps at the Red Bull Ring in a Red Bull in Time Trial.
Set 50 clean laps in a Sauber on any track in Time Trial.
Set 100 clean laps in Time Trial on any combination of tracks.
Set 30 clean laps at Singapore in Time Trial.
Set 50 clean laps in a Williams on any track in Time Trial.
Set a clean lap time for all circuits in Time Trial.
Set a lap time at 5 different circuits in Time Trial in the wet.
Set a lap time at 5 different circuits in Time Trial in the dry.
Set a time at a Time Trial Event.
Complete 50 online races.
Complete 25 online races.
Reach 100 points in an online championship.
Complete 5 online races.
Win a race on the final lap, coming from behind.
Complete an online race in the Hardcore Hopper.
Win an online race.
Complete an online race in the Standard Hopper.
Complete an online race in the Beginner Hopper.
Place in the top 16 in qualifying in Pro Season mode 5 times.