Queen are putting out a special treat today (Tuesday) for their hard-core fans.

They had two albums under their belt in 1974 — Queen and Queen 2 — when the decision was made that their third album should be a live one. They had just come off a European tour opening for Mott the Hoople when they were booked to headline the prestigious Rainbow Theater in London in March of ’74. The show sold out right away and their popularity grew, which enabled them to perform there again that November. But in between those shows, the creative juices flowed, which resulted in the Sheer Heart Attack album, and the Rainbow tapes were put on the shelf — until now.

Out today is Live at the Rainbow ’74, which features more than a dozen tracks never previously released on any official Queen live album. Among the highlights are “Killer Queen,” “Keep Yourself Alive,” “Seven Seas of Rhye” and “Stone Cold Crazy.”

Brian May tells us it “was a dream” to play the Rainbow. “I have to say it was a turning point… You just felt the energy. It was incredible. We knew something big was happening.”

And for those not familiar with early Queen, drummer Roger Taylor says, “We were a heavy rock band. This was before we had any pop hits.”

Live at the Rainbow ’74 is available on CD, vinyl, DVD/Blu-ray and digitally.