HEAT REBORN
HEAT REBORN is a free to play Source engine game by HEAT REBORN DEV TEAM. It is an attempt to recreate DOOBIC Entertainment's Heat Project. A private beta registration was launched in August 2020 (https://www.heatreborn.com/en/2020/08/22/closed-beta-is-now-open-for-pre-registration/) and public beta registration was launched in February 2021 (https://www.heatreborn.com/en/2021/02/13/heat-reborn-public-test-announcement/). Early access began in May 2021 (https://www.heatreborn.com/en/2021/05/08/%e3%80%8aheat-reborn%e3%80%8b9-may-release-patch-notes-public-beta-ends-early-access-begins/).
HEAT REBORN's developer has been listed as HEAT REBORN DEV TEAM: according to their website "HEAT REBORN is wholeheartedly crafted by amateur indie game developers" (https://www.heatreborn.com/en/) and according to their Patreon, they are "formed by few hobbyist indie game developers mainly work in spare time" (https://www.patreon.com/heatreborn/about). It is unclear how many developers work on the game but there are at least two.
HEAT REBORN is free to play and the developers "do not aim to profit" (https://www.heatreborn.com/en/). A Patreon is also offered (https://www.patreon.com/heatreborn). Given this, it's not clear how servers are maintained, although one of the developers, PakHang 'Poheart' Tsang runs https://csgo.com.hk/ and https://mixbot.net/ as part of IDEA FIELD ENTERTAINMENT LIMITED: it is possible that these ventures provide servers for HEAT REBORN.