Well going through my collection, sorting by defunct and pre 2000, I came up with this list:
Next Generation
98: May-Oct, Dec
99: Feb-Aug, Oct-Dec
00: Jan-Jun, Aug-Oct, Dec
01: Jan, Aug-Dec
02: Jan
Official Dreamcast Magazine
99: Sep (1), Nov (2)
00: Sep/Oct (7), Nov (8) - Holiday (10)
01: Feb (11)
EGM
92: Nov
95: May
99: Jul, Sep, Oct
Official US Playstation Magazine
00: Mar-May, Jul, Aug, Nov
02: Sep
03: Jan, Sep
PSM
00: Aug, Sep
02: Feb-May, Nov
GamePro
98: Apr
99: Mar, Jul-Sep
00: Mar
Incite
99: Dec(1)
00: Jan-Mar, Jun
Game Players/Ultra/Game Buyer
94: Nov
95: Jun-Sep
96: Jan-Jul, Dec (start UGP)
97: Jun
98: Apr-Jun, Aug (start GB), Sep
I have lots more of some newer EGMs and lots of Game Informer post 2002.