Original 9-24-2020 TLS Launch

Released with official L4D2 update on 9-24-2020:

LEFT 4 DEAD 2 "LAST STAND" UPDATE
https://store.steampowered.com/oldnews/75849
https://www.l4d.com/laststand/

Steam Workshop Mirror (w/ changelogs/guides):

TLS Community Update Testing Initiative
https://steamcommunity.com/sharedfiles/filedetails/?id=1959405608