invitation-only game

noun phrase
UK /ˌɪnvɪˈteɪʃən ˈəʊnli ɡeɪm/
US /ˌɪnvɪˈteɪʃən ˈoʊnli ɡeɪm/

A game you can only play if someone asks you to join.

The secret treehouse club had an invitation-only game that only members could play.


OTHER MEANINGS

2. A video game session that only invited players may join.

The streamer hosted an invitation-only game for her closest fans.

3. A sports match or contest open only to invited teams or players.

The charity tournament was an invitation-only game for local schools.

4. A party game that only people on the guest list are allowed to play.

At the birthday party, the treasure hunt was an invitation-only game.