In career mode one can unlock additional events called invitational events by fulfilling certain requirements.

Event	How to unlock
Ardennes Kart Masters Cup	Win The LMP3 UK Semi Pro Cup.
Atom Blaster Supercup	Win The Formula C British Series.
Atom Blaster Trophy	Win The GT3 RGT-8 Supercup.
Audi Ruapuna Track Challenge	Complete 22 career podium finishes.
Azure 3-Point Trophy	Win The LMP3 US Semi Pro Cup.
Benz A45 Club Trophy	Win The LMP2 Pan-Euro Trophy.
BMW 1M Eifelwald Sprint Club	Complete 15 Career Races.
BMW 320TC Touring Challenge	Complete 28 career podium finishes.
Boa Ascent Challenge	Win the LMP3 US Rookie Cup.
California 3-Point Trophy	Complete 250 Career Laps.
Caterham Academy	Win The Superkart UK Nationals.
Caterham League 500	Win The Formula C US Series.
Coyote Noose Showdown	Win the Formula C US Series.
Dubai Kart Masters Cup	Complete 5 Career Races.
German Supercar Challenge	Win The Starlight Glen 6 HR GT Endurance.
Glencairn Kart Club Trophy	Complete 50 Career Laps.
Historic C1 Euro Cup	Complete 12 Career Races.
Historic GT4 M1 ProCar Challenge	Complete 125 Career Laps.
Historic GT5 320 Turbo Pan-Euro Cup	Complete 150 Career Laps.
Historic GT5 Capri US Torque Riders Cup	Win The LMP2 American Trophy.
Historic GT5 UK Trophy	Complete 35 Career Races.
Historic GTC-TC Euro Classic Cup	Win The American Endurance Championship.
Historic GTC-TC Nations Trophy	Win The GT3 Asia-Pacific Trophy.
Historic TC2 Escort Classic Trophy	Win The Formula Rookie Euro Trophy.
Historic TC2 Euro Classic 300	Win The LMP3 UK Rookie Cup.
Historic TC2 UK Trophy	Set 5 Best Career Qualifying Times.
Historic TGA E30 Drivers Classic	Win The Tri-Nations 1000 LMP Endurance.
Historic TGA Euro Trophy	Complete 10 Career Races.
Historic TGA Evo 2 Drivers Classic	Win The Formula Rookie UK Challenge.
Historic TGA RS500 Drivers Classic	Win The Formula C Asia-Pacific Series.
Lakeville Focus Challenge	Earn 15 Career Podium Finishes.
Lancer Club Sakitto West Showdown	Win The LMP3 US Rookie Cup.
LeMans 24H Endurance	Earn 30 Career Podium Finishes.
Lotus Vintage Formula Challenge	Win the Formula C British Series.
Lotus Vintage GT Challenge	Win the GT3 Asia-Pacific Trophy.
McLaren Brands Hatch Club Day	Win The LMP1 American Masters.
McLaren F1 Track Masters 3 HR Trophy	Complete 175 Career Laps.
Mojave Trifauna Trophy	Win the GT4 US Trophy.
Mono Redliners Trophy	Win The GT3 UK Trophy.
Pagani Monza Club Day	Complete 30 Career Races.
Road Entry Club UK Cup	Complete 100 Career Laps.
Road TC Euro Championship	Complete 20 Career Races.
Road TC1 UK Cup	Complete 200 Career Laps.
Road TC2 US Cup	Win The GT4 US Trophy.
Road TD Brands Showdown	Earn 10 Career Podium Finishes.
Road TD British Track Challenge	Earn 5 Career Podium Finishes.
Road TD German Track Challenge	Win The Nordschleife 12 HR LMP Endurance.
Ruapuna LMP900 Showdown	Complete 24 career podium finishes.
RUF CTR3-GT Velocity 1H	Win 2 Team Championships.
Supercar Ardennes Club Day	Win The GT3 RGT-8 German Cup.
Supercar Azure PointMan Trophy	Win The European Endurance Championship.
Supercar California PointMan Trophy	Win The GT4 Asia-Pacific Trophy.
Supercar FreeFall 24 HR Panorama	Win 4 Team Championships.
Supercar US Clubsport Trophy	Complete 42 Career Races.
TrackDay 25 HR Green Hell Madness	Complete 1000 Career Laps.
TrackDay 25 HR Panorama Madness	Complete 500 Career Laps.
Vintage F1 Lotus Class Of 67 Historic Cup	Win The LMP1 Pan-Euro Masters.
Vintage F1 Lotus Class Of 74 Vintage Cup	Win The Tri-Nations 1000 GT Endurance.
Vintage F1 Lotus Class Of 77 Classic Cup	Win The GT4 UK Trophy.
Vintage F1 Lotus Class Of 86 Masters Cup	Set 10 Best Career Qualifying Times.
Vintage GT GT40 Challenge	Complete 17 Career Races.
Vintage GT TransAm Cobra Cup	Win The Nordschleife 12 HR GT Endurance.
Vintage Stock Caper Special Trophy	Win The GT3 US Trophy.
WMD Euro Trackday Trophy	Complete 25 Career Races.
WMD UK Trackday Trophy	Win The Formula Rookie US Challenge.
WMD US Trackday Trophy	Win The Formula Rookie German Challenge.
Zonda R Championship	Win The Rising Sun 6 HR LMP Endurance.