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