Neopets

Neopets is a free-to-play virtual pet browser game. First launched in 1999, the game allows users to own virtual pets ("Neopets") and explore a virtual world called "Neopia." Players can earn one of two virtual currencies. One currency, called Neopoints, can be obtained for free through on-site features like games, events, and contests. The other, Neocash (NC), is purchased with real-world money and can be exchanged for wearable items for pets.