Arrived from the word owned,
which arrived from the word own,
Which came from the word CAT

1. Getting seriously owned by someone or something.
2. Losing so bad it hurts.

To headshot someone in an online fps game.

Partionally Owned

Used when winning against your opponent in a match during the game.

The word pwned means the total decimation of a person place or thing. Contrary to some sources the earliest usage of the word pwned comes from online pvp matches in the game Diablo II.

Years before warcraft existed, mid combat chat was about typing fast, before getting killed from having your hands away from the movement keys. The spelling mistake owned to pwned was common. As it sounded far funnier (Porned) it stuck.

To be owned by someone or badly beaten