Here is the full list of all 62 Northgard trophies - there are 57 bronze, 3 silver, 1 gold and 1 platinum.
Win with the clan of the Wolf [not in Story Mode]
Win by taking control of Yggdrasil [not in Story Mode]
Build the Relic of Horn of Managarm
Complete each of the secret objectives of the first chapter of Rig's Saga
Win with the Clan of the Boar [not in Story Mode]
Achieve a Trade Victory [not in Story Mode]
Build the Relic of Mask of Gullinbursti
Win with the clan of the Raven [not in Story Mode]
Build the Relic of Naglfar
Win with the clan of the Bear [not in Story Mode]
Achieve a Domination Victory [not in Story Mode]
Heal Vedrfolnir once [not in Story Mode]
Build the Relic of Scabbard of Gram
Unlock level 3 of the Conqueror Path
Explore every zone of Northgard [not in Story Mode]
Colonize the Thor Wrath tile once [not in Story Mode]
Win with the clan of the Goat [not in Story Mode]
Achieve a Fame Victory [not in Story Mode]
Unlock level 3 of the Tactician Path
Build the Relic of Eldhrumnir
Kill 20 Draugar in a single game [not in Story Mode]
Destroy a Kobold camp [not in Story Mode]
Colonize 1 geyser tile [not in Story Mode]
Achieve a Wisdom Victory [not in Story Mode]
Win with the clan of the Stag [not in Story Mode]
Unlock level 3 of the Guardian Path
Kill 20 Wolves in a single game [not in Story Mode]
Kill 3 bears in a single game [not in Story Mode]
You have completed the game
Win by guarding the Gate of Helheim [not in Story Mode]
Win by forging the Sword of Odin [not in Story Mode]
Win a Ragnarok game
Achieve 10 victories with any clan [not in Story Mode]
Achieve 25 victories with any clan [not in Story Mode]
Achieve 50 victories with any clan [not in Story Mode]
Achieve 100 victories with any clan [not in Story Mode]
Achieve 250 victories with any clan [not in Story Mode]
Kill the Wyvern [not in Story Mode]
Kill 10 Valkyries in a single game [not in Story Mode]
Kill 10 Rock Golems
Unlock the Giant's Warchief [not in Story Mode]
Befriend the Myrkalfar
Complete each of the secret objectives of the second chapter of Rig's Saga
Complete each of the secret objectives of the third chapter of Rig's Saga
Complete each of the secret objectives of the fourth chapter of Rig's Saga
Complete each of the secret objectives of the fifth chapter of Rig's Saga
Complete each of the secret objectives of the sixth chapter of Rig's Saga
Complete each of the secret objectives of the seventh chapter of Rig's Saga
Complete each of the secret objectives of the eighth chapter of Rig's Saga
Complete each of the secret objectives of the ninth chapter of Rig's Saga
Complete each of the secret objectives of the tenth chapter of Rig's Saga
Complete each of the secret objectives of the eleventh chapter of Rig's Saga
Complete all the secret objectives in every chapters of Rig's Saga
Complete Rig's Saga in Normal difficulty (or above)
Complete Rig's Saga in Hard difficulty (or above)
Complete Rig's Saga in Expert difficulty
Build the Relic of Mjöllnir
Build the Relic of Svalinn
Build the Relic of Jörmunr
Build the Relic of Bragaful
Build the Relic of Gefjun's Jar
Build the Relic of Hlidskjalf