Man pages matching name atc in section 6:

atc.6.en	debian 10 / bsdgames
atc.6.ja	debian 10 / manpages-ja
atc.6.en	debian 11 / bsdgames
atc.6.ja	debian 11 / manpages-ja
atc.6.en	debian 12 / bsdgames
atc.6.fi	debian 12 / manpages-fi
atc.6.ja	debian 12 / manpages-ja