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