| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| N.R.G. (12", Promo) | MCA Records Ltd. | WMCAT 1386 | UK | 1989 | |
| N-R-G (12") | MCA Records Ltd. | MCAT 1386 | UK | 1990 | |
| N-R-G (12") | MCA Records Ltd., WEA Musik GmbH | 2292-57305-0 | Germany | 1990 | |
| N-R-G (12") | MCA Records | MCA-24015 | Canada | 1990 | |
| N-R-G (12", Single) | MCA Records | MCA-24015 | US | 1990 | |
| N-R-G (7") | MCA Records Ltd. | MCA 1386 | UK | 1990 | |
| N-R-G (7") | MCA Records | 2292-57307-7 | Germany | 1990 | |
| N-R-G (7") | MCA Records Ltd. | MCA 1386 | UK | 1990 | |
| N-R-G (CD, Maxi) | MCA Records Ltd. | DMCAT 1386 | UK | 1990 | |
| N-R-G (CD, Maxi) | MCA Records Ltd., MCA Records Ltd. | DMCAT 1386, 2292-57305-2 | Germany | 1990 |
referencing N-R-G, 12", MCAT 1386