ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti sˈɪks, θɹˈiː ˈɛm daɪvˈɛstᵻd ɪts ɡˈeɪm bˈɪznəs tʊ ˈævælən hˈɪl ʌv bˈɔltɪmˌoːɹ, wˌɪtʃ pˈʌblɪʃt ɪɾ ʌntˈɪl nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt, wˌɛn ɪt dɪsbˈændᵻd.
In 1976, 3M divested its game business to Avalon Hill of Baltimore, which published it until 1998, when it disbanded.