2. Source (game engine) - Wikipedia
Link: https://en.wikipedia.org/wiki/Source_(game_engine)
Description: Source is a 3D game engine developed by Valve. It debuted as the successor to GoldSrc in 2004 with the releases of Half-Life: Source, Counter-Strike: Source, and Half-Life 2. It is most well-known for its usage by Valve, but the engine has been used both by small teams and individuals to create modifications of Valve games, and other studios creating distinct games, notably Troika Games' title Vampire: The Masquerade – Bloodlines. Valve continued to create incremental updates to the Sour… Initial release: June 2004; 19 years ago
Initial release: June 2004; 19 years ago