First load pulls in the whole 3D world, so give it a few seconds.
Blocky third-person tag for up to 24 at once — and an AI when nobody's about.
The oldest game there is, played in 3D with whoever else has the page open — up to twenty-four of you in the same field. Type your name and you drop straight into the arena as a blocky little character. Whoever is It runs faster than everybody else, so when they come for you, you really have to move. Get caught and you're It: you lose a few points, and whoever tagged you gains some. Bring a crowd and the game grows with it — a big group gets several chasers at once, and they can work together to corner you. Turn up when the arena is empty and a player called AI comes out to give you a game, then steps aside as soon as somebody real joins. The camera sits behind your shoulder, so use the walls, cut the corners, and look over your shoulder to see how close they are.