Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Be a Rookie (10 points): Win your first race.
Transmission Wizard (15 points): Win a race using manual transmission with opponents at Professional or Real level.
Simulation Wizard (15 points): Win a race in extreme simulation mode with opponents at Professional or Real level.
Who Needs Wheels? (10 points): Perform at least 10 seconds of wheelies and win the race.
King of Assen (15 points): Win a race on Assen with less than a 3 second gap at Professional or Real.
Tires are Expensive (10 points): Win a race with tyre wear activated and with a minimum waste of tires.
Back to my First Love (10 points): Win a race at least at professional difficulty level using Max Biaggi and his Aprilia.
Milestone Best Friend (10 points): Win a race at Misano Adriatico using Luca Scassa.
Telemetry Expert (10 points): Compare two telemetries.
Somebody Will Be Quite Angry Now (10 points): Win a race with a gap of less than 1" from second place.
Despite bad luck (10 points): Win a race with a heavily damaged bike.
Impossible Comeback (10 points): Win a quick race starting from last position at Professional difficulty level.
Italy Rules the World (10 points): Win a race with all the Italian riders.
Turnaround (10 points): Win a race performing at least 2 360's.
I'm the Wizard (10 points): Win a race at Monza using Michel Fabrizio.
Dorifuto Kingu (10 points): Win a race performing at least 10 seconds of skids.
The Pirate lands in America (10 points): Win a race with Biaggi at Salt Lake City.
Straight out of the factory (15 points): Win a race at Imola using a Ducati Xerox.
Mr. Crocodile Under the Water (15 points): Win a rainy race using Troy Corser.
Living on the Edge (15 points): Perform 10 seconds of wheelies and 10 seconds of skids in any game mode.
Out of time (10 points): Win a race with a 10 second gap or more from second place.
Someone has to read them now (30 points): Watch all credits.
Teatime (20 points): Win at least 5 races at Donington.
Teamwork (30 points): Win at least one race with each of the SBK teams.
Mr. Superpole (20 points): Achieve at least 10 Superpoles in the same Single Player championship.
Pure ruler, out of the box (25 points): Win on all tracks on-line .
Italian Miracle (20 points): Win a Single Player Championship with Pedercini team.
The SBK Kamikaze (10 points): Win at least one race with all the Japanese riders.
The Prancing Pony (15 points): Perform 60 seconds of wheelie and finish at least in fourth position.
I'm the Star (20 points): Win a Single Player championship using the team Suzuki Alstare.
Bronze Medal (20 points): Win at least a bronze medal in every Scenario.
Silver Medal (30 points): Win at least a silver medal in every Scenario.
Tight Rope Walker (40 points): Finish 10 races in a row without falling.
The championship is on the line (30 points): Win an on-line Championship.
Winning Streak (30 points): Win 10 races in a row.
Pure Ruler (40 points): Win on all tracks.
Gold Medal (40 points): Win at least a gold medal in every Scenario.
How Cool are my Trophies? (40 points): Complete the Cups board.
The True SBK Hero (40 points): Win at least 3 Single Player championships.
Rainbow Decks (50 points): Win all the cards of the game decks.
Style Victory (30 points): Win a clean race, without falls and shortcuts.
Once he was Bayliss (15 points): Win a Single Player championship using a Ducati Xerox Team bike.
A True Rider (35 points): Win a Single Player championship using the simulation mode.
A Perfect Weekend (30 points): Get pole position and win race 1 and race 2 in the same Event.
Victories in 5 continents (20 points): Win a race at Phillip Island, Losail, Salt Lake City, Kyalami and Monza.
Lucky Man (30 points): Get 7th place three times in the same Single Player championship.
I pwn n00bs (15 points): Perform a 360 burnout and win an on-line quick race.

Additionally, there are two secret achievements:

Milk Shake (10 points): Damage a Team Sterilgarda bike to the retirement.
Unlucky Man (25 points): Lose 13 on-line races.