Man pages matching name acquire_screen in section 3alleg4:

acquire_screen.3alleg4.en	debian 10 / allegro4-doc
acquire_screen.3alleg4.en	debian 11 / allegro4-doc
acquire_screen.3alleg4.en	debian 12 / allegro4-doc
acquire_screen.3alleg4.en	debian 13 / allegro4-doc