In 1981, art studio Hipgnosis was asked to design a cover based on the original title, and it developed a black-and-white image of a young man in bed with a pair of binoculars suspended in the air overhead.

[16] Classic Rock critic Malcolm Dome also rated two songs from 4 among Foreigner's 10 most underrated—"I’m Gonna Win," which he compares to "Juke Box Hero," at #8 and "Night Life,"—which he praises for its "confident energy," at #1.

[17] PopMatters critic Evan Sawdey called "Night Life" a "remarkably limp album opener.

[19] All tracks are written by Mick Jones, with additional songwriting by Lou Gramm on tracks 1-2, 4-5 and 9-10.4 was released in 2001 in multichannel DVD-Audio,[21] and on September 14, 2011, on hybrid stereo-multichannel Super Audio CD by Warner Japan in its Warner Premium Sound series.

[22] It was rereleased in June 2015 by Atlantic Records as premium 180-gram vinyl with its original 1981 track listing.