This is one of my all time favourites, and still is after so many years.
The game tells the story of Ben, the leader of a biker gang known as "The Polecats." Schafer played his cards right in the creation of this character, as Biker Gangs are usually unlikable folks. Ben, while still a ruthless badass, is surprisingly kind and likable, making him a memorable protagonist. He may not have qualms taking a chainsaw to the face of a member from another gang, but he's not a murderer or a rapist. The story is excellently told, and has many fun twists and turns, and even some genuine chemistry between the characters. This is easily the most "constructed" of the classic adventure games, while there's still some wacky humour and bizarre situations, its not deadpan and disjointed like the others when it comes to dialogue, characters, etc.
The voices are great.
The music is great.
The story is great.
The puzzles are great.
This game is great.
Need I really say more?