World of Goo

Runner-up: Battle for Wesnoth

For the first time in the history of histories, Frozen Bubble is not the most popular game! In fact, Frozen Bubble didn't even take second this year, as it lost to Battle for Wesnoth by half of a percentage point. (Normally we'd consider that a tie, but Battle for Wesnoth deserves recognition for bumping off the Bubble.) World of Goo is a game similar in addictiveness to Frozen Bubble, but with better graphics and more modern gameplay. If you're a casual gamer, check out World of Goo, it's really Goo-ood.