Todd, Brett (December 16, 2008). "Metal Slug 7 Review". GameSpot. Red Ventures. Archived from the original on April 22, 2022. Retrieved April 22, 2022.
Todd, Brett (May 27, 2010). "Metal Slug XX Review (X360)". GameSpot. Red Ventures. Archived from the original on April 22, 2022. Retrieved April 22, 2022.
Hargreaves, Roger (May 2010). "Metal Slug XX (360)". Teletext Gamecentral. Teletext Ltd. Archived from the original on May 23, 2010. Retrieved April 22, 2022.
Todd, Brett (December 16, 2008). "Metal Slug 7 Review". GameSpot. Red Ventures. Archived from the original on April 22, 2022. Retrieved April 22, 2022.
Todd, Brett (May 27, 2010). "Metal Slug XX Review (X360)". GameSpot. Red Ventures. Archived from the original on April 22, 2022. Retrieved April 22, 2022.
Hargreaves, Roger (May 2010). "Metal Slug XX (360)". Teletext Gamecentral. Teletext Ltd. Archived from the original on May 23, 2010. Retrieved April 22, 2022.