| Xenophobe | US | 1989-12 |
Sunsoft | Commercial |
| Xevious | EU | 1989-10-25 |
Namco | Commercial |
| Xevious | JP | 1984-11-08 |
Namco | Commercial |
| Xevious | WORLD | 1984-11-08 |
Namco | Commercial |
| Xevious - The Avenger | US | 1988-09 |
Namco | Commercial |
| Xevious - The Avenger | WORLD | 1988-09 |
Bandai | Commercial |
| Xexyz | US | 1990-04 |
Hudson Soft | Commercial |
| Xi Chu Bawang | CN | |
Waixing | Unlicensed |
| Xiake Chuanqi | CN | |
Shenzhen Jncota | Unlicensed |
| Xiake Qing - Jingke Ci Qinwang | CN | |
| Unlicensed |
| Xiang Shuai Chuanqi | CN | |
Shenzhen Nanjing Technology | Unlicensed |
| Xianjian Qi Xia Zhuan | CN | |
| Unlicensed |
| Xianjian Shenqu | CN | |
| Unlicensed |
| Xianjian Wen Qing | CN | |
Shenzhen Nanjing Technology | Unlicensed |
| Xianjie Jingling | CN | |
| Unlicensed |
| Xiao Ao Jianghu | CN | |
| Unlicensed |
| Xiao Ao Jianghu - Qun Xia Ji | CN | |
Shenzhen Nanjing Technology | Unlicensed |
| Xiao Boshi Jiaoyu Ruanjian Xilie - Zhili Xiao Zhuangyuan | AS | |
| Unlicensed |
| Xiao Mali | AS | |
| Unlicensed |
| Xiao Mali | TW | |
Idea-Tek | Unlicensed |
| Xiao Zhuangyuan | CN | |
| Unlicensed |
| Xiao Zhuangyuan Shuxue 7-in-1 | CN | |
| Unlicensed |
| Xiaobawang Zhongyingwan Diannao Xuexiji III - Yujiao Yule | AS | |
| Unlicensed |
| Xiaoxuesheng Shuxue CAI | CN | 1996 |
Waixing | Unlicensed |
| Xin Bao Qingtian - Super Justice King | CN | |
| Unlicensed |
| Xin Mojie | CN | |
| Unlicensed |
| Xin Shanhai Jing I - Guaishou de Chuanshuo | CN | |
| Unlicensed |
| Xin Yingxiong Zhuan | CN | 1992 |
Shenzhen Nanjing Technology | Unlicensed |
| Xin Yue Jian Hen | CN | |
Shenzhen Nanjing Technology | Unlicensed |
| Xing Zhan Qingyuan | CN | 1996 |
Henggedianzi | Unlicensed |
| Xinghe Zhandui | CN | |
| Unlicensed |
| Xinghe Zhanshi | CN | |
| Unlicensed |
| Xingji Wushi - Super Fighter | CN | |
| Unlicensed |
| Xingji Zhengba | CN | |
| Unlicensed |
| Xitian Qujing - Journey to the West | AS | 1994 |
Micro Genius | Unlicensed |
| Xitian Qujing II - Journey to the West | CN | |
| Unlicensed |
| Xiyou Ji Hou Zhuan | CN | |
| Unlicensed |
| Xuanyuan Jian - Feng Zhi Wu | CN | |
| Unlicensed |
| Xuanyuan Jian - Tian Zhi Hen | CN | |
| Unlicensed |
| Xuanyuan Jian - Wangzhe Guilai | CN | |
| Unlicensed |
| Xuanyuan Jian - Xian Zhi Yuan | CN | |
| Unlicensed |
| Xuanyuan Jian - Yun de Di Duan | CN | |
| Unlicensed |
| Xuanyuan Jian Waizhuan - Zhi Tian Zhi Hen | CN | |
| Unlicensed |
| Xuanzhuan Jiansi - Yumao Chuanqi | CN | |
| Unlicensed |
| Xun Qin Ji | CN | |
Nanjing | Unlicensed |
| Xybots | US | 1991 |
Atari | Prototype |