Here is the full list of all 48 Session: Skate Sim achievements.
Complete all historical challenges
Complete all the historical challenges in Philadelphia
Perform [500] Feebles
Perform [500] Laser Flips
Perform [500] Inward Heelflips
Manual for a total of [21] km
Perform [500] Smith grinds
Perform [500] Hardflips
Complete all the historical challenges in San Francisco
Slide / Grind for a total of [42] Km
Perform [500] 360 Flips
Perform [500] Boardslides
Complete all the historical challenges in NYC (Includes Pyramid Ledges, Black Hubba, LES Coleman, Highline Bridge, Jerome Banks)
Perform [500] Lipslides
Perform [500] 50-50
Perform [500] 5-0 grinds
Perform [500] Noseslides
Perform [500] Crooked grinds
Perform [1001] Heelflips
Reach Pro status with “Manual” catch ON (From 1st quest to Pro)
Reach Pro status
Complete all the pros challenges (All pro story arcs)
Complete all Dane Burman missions
Completed all RIBS MAN missions
Perform [500] Nose grinds
Complete all Donovan Strain missions
Perform [500] Tailslides
Buy [50] DIY items from the shop
Buy [100] customised items at the shop
Complete all Billy Marks missions
Perform [1001] Kickflips
Complete all Jahmir Brown missions
Complete all Samaria Brevard missions
Complete all Torey Pudwill missions
Complete all Ryan Thompson missions
Complete all Nora Vasconcellos missions
Complete all Louie Barletta missions
Complete all Annie Guglia missions
Complete all Manny Santiago missions
Complete all Antiferg missions
Complete all Beagle missions
Complete all Daewon Song missions
Reach Am status
Reach Flow status
Complete all Mark Appleyard missions
Visit all cities apartments (HUB)
Reach Shop sponsored status
Complete the tutorial