Here is the full list of all 25 Hero of Not Our Time achievements.
Meet a gang of gnomes.
Collect 1000 coins per game.
Ride the gruggle.
Meet a Mimic.
Create a new type of weapon.
Die in tutorial mode.
Explore all locations.
Complete tutorial mode.
Fall into the abyss.
Collect 10,000 coins per game.
Collect 50,000 coins per game.
Inject 100 painkillers per game.
Inject 500 painkillers per game.
Open all magic scrolls.
Clear the room without raising an alarm.
Find a companion dog.
Find a rainbow cloak.
Kill 100 enemies per game.
Kill 250 enemies per game.
Attach the grenade launcher to the weapon.
Defeat all bosses.
Complete the game with a bad ending.
Complete the game with a good ending, but sacrifice yourself.
Complete the game with a good ending.
Save the game 25 times per game.