Specifically page 50 of the Janurary 1996 issue. It's at the end of a glowing review for Breathless, a late-Amiga FPS.
Where does Marathon factor into this? The author getting a dig in at it, plus at Doom. (Amusingly, the March '98 issue, which looked at Amiga!Doom, admits in a sidebar that none of the previous Amiga FPSes, Breathless included, were quite like "the real thing"...) Unfortunately, I didn't find anything else.
...except, technically, this review of Abuse from the December '98 issue.