Here is the full list of all 28 Remnants achievements.
Complete the introduction section.
Find the lava elemental key.
Find the ice elemental key.
Find the thunder elemental key.
Find the acid elemental key.
Find the steam elemental key.
Find the crystal elemental key.
Insert all 6 elemental keys.
Defeat the lurking danger inside the ruins.
Find 50% of the enhancement orbs.
Find 100% of the enhancement orbs.
Destroy 80 elemental crystals in the environment.
Reach lvl 15.
Defeat 20 drones.
Defeat 100 drones.
Defeat 300 drones.
Craft 15 elemental gems.
Defeat the lurking danger inside the ruins in less than 4 minutes.
Don't die in a single run.
Do 3000 damage in a single hit.
Don't change the player stat distribution in a single run.
Beat the game in less than 25 minutes.
Kill 30 drones with the lava element.
Kill 30 drones with the ice element.
Kill 30 drones with the thunder element.
Kill 30 drones with the steam element.
Kill 30 drones with the crystal element.
Kill 30 drones with the acid element.