Here's how the game handles the confrontation with Lord Voldemort possessing Quirrell:
1. The Duel: You play as Harry Potter and engage in a duel with Quirrell. The game simplifies the fight, focusing on dodging Quirrell's attacks and hitting him with spells.
2. The Reveal: During the duel, Quirrell's head starts to spin and you see Lord Voldemort's face peeking out from the back of his head.
3. The "Defeat": After a few hits, Quirrell/Voldemort is defeated. The scene then cuts to Quirrell's body collapsing, with Voldemort's spirit vanishing.
It's important to note that the game doesn't portray a violent killing. Instead, it focuses on the duel and the symbolic "defeat" of Voldemort's physical manifestation.