Full list of all 51 Trials Fusion achievements worth 2,750 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 16 achievements worth 1,000 Gamerscore, and there are 7 DLC packs containing 35 achievements worth 1,750 Gamerscore.
Use the Track Editor to find and pick up the 'Fifth Key' in the Fusion world
Find all of the squirrels hidden within the first 8 Events
Complete all 'Full Throttle' Track Challenges in the first 8 Events
Complete all 'Unyielding' Track Challenges in the first 8 Events
Purchase the complete set of a fully upgraded outfit
Post a time on another player's created track
Complete Inferno IV
Acquire the Trials Trophy
Score 20,000 points from one jump on an FMX track
Complete all 3 Track Challenges on any track
Earn 24 Gold medals
Hold a 'Proud Hero' pose to your demise, dressed in an Excavator outfit
0-fault Fusion Factory with the Quad Bike
Complete Training Program 2
Get run over by your own bike
Completed every Track Challenge in the first 8 Events
Find all 3 squirrels on Riders of the Rustlands
Beat level -1 in 'The Magnetic 10' challenge on 'Junkyard Funk'
Pass all tracks on Riders of the Rustlands
Complete the 'Wormfood' challenge on 'Gone to Waste'
Complete the 'Slumdog Billionaire' challenge on 'Rags to Riches'
Destroy all the ecosystems on 'Eden' in a single run
Find all 3 squirrels on Empire of the Sky
Pass all tracks on Empire of the Sky
Gatecrash an apartment on 'Winter Getaway' and complete their arcade game
Complete all 3 challenges on 'Stratosphere' in a single run, with less than 15 faults
Find all 3 squirrels on Welcome to The Abyss
Finish all of the hidden Ancient Warp Zones
Complete the 'Awaken the Kraken' challenge on 'Deluge'
Pass the thunder storm in 'The Long Haul' whilst on fire!
Pass all tracks on Welcome to The Abyss
Find all 3 squirrels on Fire in the Deep
Clear the 'Hunter of Secrets' challenge on 'Deeper Underground'
Pass all tracks on Fire in the Deep
Find all of Commander Zudina's audio logs
Reach the 5th Circle in the 'Circles of Hell' skill game
Find all 3 squirrels on Fault One Zero
Complete the 'Testing Ground' challenge whilst wearing the full level 3 BioTech outfit
Complete the 'Shutdown' challenge whilst wearing the new DarkLynx helmet
Pass all the Trials tracks on Fault One Zero with the rabbit
Pass all tracks on Fault One Zero
Go on all 5 dates with SynDI on After the Incident
Reach floor 10 on 'The Tower'
Beat a score of 40,000 on 'Final Frontier' whilst riding the Roach with the Frontier BodyKit
Pass all tracks on After the Incident
Complete the 'Lightning Rod' challenge on 'Static Discharge'
Perform a zero fault run in Neo Bradford whilst wearing the Neo Hooligan outfit
Pass all tracks on the Awesome Adventure event
Find all squirrels on the RedLynx vs All-Stars event
Reach the 40th side of the cube on Cubicle Space
Beat all of the RedLynx times on Redlynx vs All-Stars