This week’s releases include a pair of titles from R.E.M. (the band’s 1991 and 2001 “Unplugged” sessions, plus a digital rarities set), a collection of Devo demos, a new best-of from The MIssion, a new album from Paul Heaton and Jacqui Abbot of The Beautiful South, a Cramps vinyl reissue and more.

As the Arcade Fire’s current arena tour has crisscrossed the country, the band has selected a geographically significant cover song to perform each night — sometimes in full, sometimes just barely — and last night in Atlanta, the group performed a full version of R.E.M.’s 1981 debut single “Radio Free Europe.”

A new 50-song compilation of early R.E.M. material called Complete Rarities: I.R.S. 1982-1987 is due out digitally next month, but appears to be largely, if not completely, comprised of tracks previously assembled on 1987’s out-of-print Dead Letter Office, a more recent I.R.S. years best-of and singles.

Former R.E.M. frontman Michael Stipe inducted Nirvana into the Rock and Roll Hall of Fame last night at a massive ceremony at the Barclays Center arena in Brooklyn, declaring of the genre-shaping alt rock act that, “This is not just pop music. This is something much greater than that.”

Last night at the venerable 40 Watt Club in Athens, Ga., Drivin’ N Cryin’ paid tribute to late guitarist Buren Fowler, who played with that band from 1988 to 1993 after working as Peter Buck’s guitar tech and an occasional second guitarist on two R.E.M. tours.

By now you’ve heard about R.E.M.’s Mike Mills breaking the news of David Letterman’s retirement yesterday, but here’s the reason he was even there: Mills and former bandmate Peter Buck reunited on “The Late Show” to back Joseph Arthur’s performance of “Walk on the Wild Side.”

R.E.M. will release a limited-edition 4LP set on Record Store Day that collects the audio from the band’s two appearances, in 1991 and 2001, on MTV’s “Unplugged” series, featuring all 33 songs the band performed at the two tapings, including 11 that never aired on either broadcast.