The .tf domain-name has popular usage for sites related to the game Team Fortress and its sequel, Team Fortress 2. Many of these sites are commonly used for marketing of virtual goods originating from Team Fortress 2 and, by extension, the Steam Community Market. Otherwise, rarely used except for free, redirected third-level domains.
結構
Registrations are made at second level; an unofficial service makes free, redirected domains available at third level