In the Half-Life series, Gordon Freeman's signature weapon is a:

Gordon Freeman's signature weapon in the Half-Life series is a crowbar because it serves as a versatile and reliable tool that he initially finds in the beginning of the first game when he wakes up in the Black Mesa research facility. What starts as a simple tool quickly becomes his go-to weapon for survival as he battles alien creatures and explores the dangerous environment. The crowbar represents resilience, resourcefulness, and the will to survive in Freeman's hands, making it an iconic symbol of his journey throughout the series.