Infinite Craft
Neal Agarwal’s browser crafting game: combine items to make new ones, with a daily challenge.
15 AI word and guessing games you can start using for free, including free plans and open-source options, with pricing checked on each official site.
Short answer
MeetNewAI lists 15 free picks in AI word and guessing games. Start with Infinite Craft, Death by AI, Quick, Draw!, Akinator, Contexto. Prices were checked on each official site; free plans can still have paid upgrades.
Every pick below was checked on its official site. Pricing changes, so confirm the current plan before you rely on it.
Neal Agarwal’s browser crafting game: combine items to make new ones, with a daily challenge.
A survival party game where an AI decides who makes it.

Google’s doodle game where a neural network tries to guess your drawing.
The mind-reading genie that guesses the character you are thinking of.
Guess the secret word; AI tells you how close each guess is.

A daily word-guessing game driven by semantic similarity.
Hack a store of AI apps with prompt attacks, level by level.
A prompt-injection game: defend your AI bank account and break into other players'.
Ask clever questions until the wizard Merlin gives away each level's password.
Describe AI-generated images well enough to recreate them, and learn image prompting.
Conduct four singing blobs whose opera voices come from a machine learning model.
Play a few notes on the piano and an AI answers with its own melody.
Paint brushstrokes on a canvas and hear them played as music by the instrument you pick.

AI-generated videos turned into small interactive WebGL games.

Explore a 360° scene and guess when and where the moment happened.