"nosTEAM" is a well-known group that provides pre-packaged, "cracked" versions of PC games. For the DOOM Alpha, their release typically aims to make the build playable offline or via private LAN-style setups since the official alpha servers are long closed.
The DOOM 2016 Alpha PC game showcased several key gameplay mechanics that would make it into the final product: DOOM 2016 Alpha PC game --nosTEAM--
This article dives deep into the history, technical quirks, legal minefields, and enduring allure of the DOOM 2016 Alpha PC game --nosTEAM--. DOOM 2016 Alpha PC Game Guide: No Steam Required 1
tag indicates a version of this software modified by a well-known P2P (peer-to-peer) piracy group. The Repack Game Mechanics: The DOOM 2016 Alpha PC game