This is solo during the campaign in the silent cartographer level. 1 2 3 4 1 2 3 4 |------------15b14-17~~~~~~~---12-14-|15b14-12-15-15-15-15p14p12-12----15-| |17~~~~~~----------------------------|-------------------------12---15----| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| 1 2 3 4 1 2 3 4 |-------------------------------------|------------------------------------| |12~~~~~~----------15-----------------|------------------------------------| |---------14-12------12b14b12-9--10-9-|9-----9-----9---------9-------9-----| |---------------14--------------------|---14----12----12-------------------| |-------------------------------------|------------------14----14-12----12/| |-------------------------------------|------------------------------------| 1 2 3 4 1 2 3 4 |19~~~~~~~----------------------14-15|14~~~~~-----15-17-15~~~~------15-17-| |------------17-15-17~~~~------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| 1 2 3 4 1 2 3 4 |21b23~~~~23~~~~~~~~~~~~~23~~~~23~~~~|b22~~~~~~22~~~~~~~17\\\-------12-14-| |------------------------------------|------------------17\\\-------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| 1 2 3 4 1 2 3 4 |12~~~~~~~---------------------------|------------------------------------| |------------------15-12-15-12-15-15-|14~~~~~~~14\---------------12-15-12-| |------------------------------------|------------------------12----------| |------------------------------------|---------------------14-------------| |------------------------------------|-----------------/14----------------| |------------------------------------|------------------------------------| 1 2 3 4 1 2 3 4 |------------------------------------|------------------------------------| |13~~~~~~~13----12-13~~~~~-----------|------------------------------------| |---------------------------12-14-14b|16~~~~---11-12-11-12-11- -----------| |------------------------------------|------------------------14-12-------| |------------------------------------|------------------------------14-12-| |------------------------------------|------------------------------------| 1 2 3 4 1 2 3 4 |12~~~~~~\---------14~~~~~~\---/12-14|15~~~~~~~\----/17-17~~~~~~~---17-19-| |-----------/12-15-------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |19~~~~~\-17-19-19/22~~~-19-22-19-22-|24~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------| |------------------------------------|------------------------------------|
https://primanota.net/misc-computer-games/halo-theme-chords.htm