Half-Life 2 is a 2004 classic first-person shooter game developed and published by Valve. Like the original Half-Life (1998), it combines shooting, puzzles, and storytelling, and adds features such as vehicles and physics-based gameplay. Players control Gordon Freeman, who fights the alien Combine with allies including resistance fighter Alyx Vance, using weapons such as the object-manipulating gravity gun.[1]https://en.wikipedia.org/wiki/Half-Life_2. Approximately twenty years after Gordon Freeman and other scientists accidentally opened a portal to the border dimension Xen and allowed hostile aliens to invade the Black Mesa Research Facility, Freeman is awoken from stasis by the mysterious G-Man.
According to HowManyChapters.com[2]https://howmanychapters.com/game/half-life-2/, it takes an average of 13 hours to beat the 14 story chapters of Half Life 2.