as the old post say，we agree that solo player can do dungeons subclass achievement is a bug.because its said “with a full fireteam”.and the clanmates achievement have seam describe，and it dose need 3 clanmates.so its a bug that solo player can do subclass achievement，bungie need fix it. [spoiler]Moderator edit: This thread has been moved to the #Help forum where you can find answers and troubleshoot any Destiny in-game/bungie.net/companion app issues, courtesy of other helpful players and Mentors. Feel free to private message the moderator who moved your post, link to topic, for further clarification about why this topic was moved.[/spoiler]