Most free browser drift games are you alone against the clock. Neon Drift puts up to six real drivers on the same grid, in the same weather, at the same time — from a link, with nothing to install.
Cars connect directly to each other rather than through a game server, so positions, speeds and drift scores update live with very little delay. Everyone keeps their own garage: the paint, rims, neon and upgrades you built are what the other drivers see.