Game Vortex
- Review, by Matt Paddock: "Without the clay effects, Platypus would just be a standard side-scrolling shooter." [Score: 85%]
- http://www.gamevortex.com/gamevortex/soft_rev.php/3388

Extreme Gamer
- Review, by Jimmy: "What makes Platypus stand out is the graphics that have been wrapped in an layer of clay, this brings out a unique charm and the quality that pushed me up from a 5 to 6." [Score: 6 out of 10]
- http://www.extremegamer.ca/psp/reviews/platypus.php

IGN
- Screenshots, reviews, and a message board.
- http://psp.ign.com/objects/858/858163.html

GameZone
- Review, news, screenshots, and links.
- http://psp.gamezone.com/gamesell/p24517.htm

GameStats
- Screenshots, score averages, article links, and a message board.
- http://www.gamestats.com/objects/858/858163/

GameSpy
- Provides information, screenshots, and a review.
- http://psp.gamespy.com/playstation-portable/platypus/

GameSpot
- Reviews, news, previews, images, links, and a forum.
- http://www.gamespot.com/psp/action/platypus/

The Gamers Temple
- Review: "On its own there is not enough in the game to make it compelling and the gameplay is just too lackluster to sustain interest." [Score: 60%]
- http://www.gamerstemple.com/vg/games28/003035/003035r01.asp