Here is the full list of all 19 Doki Doki Literature Club Plus! trophies - there are 2 bronze, 7 silver, 9 gold and 1 platinum.
Good job! Completed all tasks!
Start a New Game.
Write a perfect poem for Sayori.
Write a perfect poem for Natsuki.
Write a perfect poem for Yuri.
Write a perfect poem for Monika.
Finish all of the Side Stories.
Achieve 100% data collection.
Love, Monika
Find Dan's special note.
Write a poem in 20 seconds or less.
Listen to a lot of what Monika has to say.
Spend enough time during the poem minigame for the music to loop.
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Ruin the game.
Choose not to quit DDLC.
Spend 20 minutes listening to music on the desktop.
Review Paula's project plan.
Delete Monika twice while getting deleted zero times.