Adam Smasher is a mercenary who, after being nearly obliterated by a trip mine, was turned into a full cyborg by the Arasaka corporation.
What with a full-body conversion, not much is left of Adam Smasher the man. Well... his humanity was always questionable. Smasher's in charge of taking out Arasaka's dirty laundry, but he likes to do things his own way. Way back in 2023, he killed Johnny Silverhand during the attack on Arasaka Tower, after which Silverhand's personality was digitized by the Soulkiller program. If Smasher finds out that Johnny's back, he'll - probably want to finish what he started. Smasher doesn't leave loose ends.
Adam grew up in New York City as a typical gang member; after his gang was wiped out, he joined the military, but was eventually discharged. Rather than turn back to a simple life of being a gang member, Adam became a gun-for-hire, and a good one at that. His reputation was strong enough that, when a mission went wrong and he was nearly killed, a representative of the Arasaka Corporation turned up with an offer: either die from his injuries or become a full cyborg, pledged to serve Arasaka.
Adam took the offer and, with years of experience under his belt, returns in Cyberpunk 2077 as an agent of Arasaka.
You look like a cut of fuckable meat. Are you?