ɪn mˈɛni kˈeɪsᵻz, ˈɜːnɪŋ hˈaɪ pˈɔɪnt vˈæljuːz ʌnlˈɑːks ɐ bˈoʊnəs mˈɪʃən dˈʊɹɹɪŋ ɡˈeɪmpleɪ, wɪð ɐ tˈoʊɾəl ʌv fˈoːɹ bˈoʊnəs mˈɪʃənz ɪn ˈɔːl.
In many cases, earning high point values unlocks a bonus mission during gameplay, with a total of four bonus missions in all.