Here is the full list of all 15 Devolver Bootleg achievements.
Beat the Boss in Enter the Dungeon
Open the System Menu 1000 times.
Open the System Menu 100 times.
Acquire 10,000 currency across all games.
Play as the frog in PikuBiku Ball Stars
Kill 100 frogs across all games.
Take damage in Catsylvania
Try to enter a cheat code.
Close the System Menu
Navigate to the Controls page of the System Menu.
Open the System Menu.
Beat Hotline Milwaukee
Unplug a Gamepad.
Purchase and launch the Devolver Digital Bootleg Launcher.
Plug in a Gamepad.