| Nintendo Famicom cart. |  WarpMan Model NWM-4500 | 1985 | NAMCOT Japan |
| Nintendo Famicom cart. | Wei Lai Xiao Zi | 1989 | Unknown |
| Nintendo Famicom cart. | Wei Luo Chuan Qi | 19?? | Jinbabilun China |
| Nintendo Famicom cart. | Western Kids Model VIS-5K | 1991 | Visco Corp. Kyoto, Japan |
| Nintendo Famicom cart. | Whang Zhe Wu Shuang Model NJ094 | 200? | Shenzhen Nanjing Technology Co., Ltd. China |
| Nintendo Famicom cart. | White Lion Densetsu - Pyramid no Kanata ni Model KSC-WE | 1989 | Kemco, Ltd. |
| Nintendo Famicom cart. | Wild Gunman Model HVC-WG | 1984 | Nintendo Co., Ltd. Japan |
| Nintendo Famicom cart. | Willow Model CAP-WI | 1989 | Capcom Co., Ltd. Japan |
| Nintendo Famicom cart. | Wily & Light no RockBoard - That's Paradise Model CAP-BE | 1993 | Capcom Co., Ltd. Japan |
| Nintendo Famicom cart. | Wisdom Boy | 19?? | Gamtec Taiwan |
| Nintendo Famicom cart. | Wit's Model ATH-XW | 1990 | Athena Co., Ltd. Japan |
| Nintendo Famicom cart. | Wizardry - Proving Grounds of the Mad Overlord Model HSP-09 P | 1987 | ASCII Corp. Japan |
| Nintendo Famicom cart. | Wizardry II - Diamond no Kishi Model HSP-32 | 1990 | ASCII Corp. Japan |
| Nintendo Famicom cart. | Wizardry II - Llylgamyn no Isan Model HSP-13 | 1989 | ASCII Corp. Japan |
| Nintendo Famicom cart. | Wo Xiang Niao Niao Hb | 2016 | Xin Xin |
| Nintendo Famicom cart. | Wolfling Hb | 201? | Lazycow |
| Nintendo Famicom cart. | Woody Poco | 1987 | DB-SOFT Japan |
| Nintendo Famicom cart. | World Boxing Model TSS-W7 | 1990 | TSS |
| Nintendo Famicom cart. | World Grand-Prix - Pole to Finish | 1989 | Data East Corp. Japan |
| Nintendo Famicom cart. | World Hero | 19?? | Unknown |
| Nintendo Famicom cart. | World Heroes 2 | 1994 | Cony Soft |
| Nintendo Famicom cart. | World Heroes 2 Pro Model YMH-WH | 1994 | Cony Soft |
| Nintendo Famicom cart. | World Super Tennis Model ASM-W1 | 1989 | Asmik Co., Ltd. Japan |
| Nintendo Famicom cart. | Wrecking Crew Model HVC-WR-JPN P | 1985 | Nintendo Co., Ltd. Japan |
| Nintendo Famicom cart. | Wu Ji Mo Jie | 19?? | HengGedianzi China |
| Nintendo Famicom cart. | Wu Jian Dao Feng Yun | 19?? | HengGedianzi China |
| Nintendo Famicom cart. | Wu Lin Wai Zhuan Model NJ073 | 200? | Shenzhen Nanjing Technology Co., Ltd. China |
| Nintendo Famicom cart. | Wu Shi Hun | 19?? | Rex Soft. China |
| Nintendo Famicom cart. | Wu Xia Tian Di Model NJ096 | 200? | Shenzhen Nanjing Technology Co., Ltd. China |
| Nintendo Famicom cart. | Wuming Chuanshuo | 200? | Waixing Computer & Technology Co., Ltd. China |
| Nintendo Famicom cart. |  WWF WrestleMania Challenge Model GAM-W9(11) | 1992 | Hot-B Japan |
| Nintendo Famicom cart. | X-Plan | 19?? | Unknown |
| Nintendo Famicom cart. | X-War | 19?? | Unknown |
| Nintendo Famicom cart. | XBK Chinese Study Cartridge | 19?? | Unknown China |
| Nintendo Famicom cart. | Xevious Model NXV-4900 P | 1984 | NAMCOT Japan |
| Nintendo Famicom cart. | Xi Chu BaWang Model ES-1066 | 19?? | Waixing Computer & Technology Co., Ltd. China |
| Nintendo Famicom cart. | Xi Tian Qu Jing II Model ES-1034 | 19?? | Waixing Computer & Technology Co., Ltd. China |
| Nintendo Famicom cart. | Xi You Ji Hou Zhuan Model ES-1097 | 19?? | Waixing Computer & Technology Co., Ltd. China |
| Nintendo Famicom cart. | Xia Ke Chuan Qi Model KT-1014 | 199? | Shenzhen Jincota Technology Co., Ltd. China |
| Nintendo Famicom cart. | Xia Ke Qing - Jing He Ci Qin Wang Model ES-1058 | 19?? | Waixing Computer & Technology Co., Ltd. China |
