Here is the full list of all 33 Defiance 2050 trophies - there are 18 bronze, 8 silver, 6 gold and 1 platinum.
Capture 50 points in PvP
Max out 4 classes
Reach level 20 in any weapon skill
Complete all co-op maps
Kill 10,000 enemies
Complete 25 sieges
Complete 4 weekly contracts
Kill the Volge Warmaster and a Volge Huntmaster
Complete 10 major arkfalls in the Bay Area
Kill Nim
Complete a daily contract
Get to EGO level 50
Complete 20 pursuits in the Bay Area
Equip your first legendary weapon
Cross the Golden Gate Bridge
Complete 10 pursuits in the Bay Area
Max out a class
Jump a total of 5 kilometers with vehicles
Kill 100 players in PvP
Complete a co-op map
Get to EGO level 10
Complete your first pursuit in the Bay Area
Fully upgrade a class ability
Complete your first major arkfall in the Bay Area
Complete your first minor arkfall in the Bay Area
Revive another player outside the tutorial
Complete the tutorial
Complete all other trophies
Max out reputation with 1 faction
Max out reputation with 4 factions
Complete the "Thorn Liro Thawandaye II" pursuit
Complete the "The Defiant Few II" pursuit
Complete "The Lion's Claw II" pursuit