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