EDF 2017 Portable - Trophy Guide and road map - Earth Defense Force 2017 Portable - PS3Imports.org
Official GBAtemp Review: Earth Defense Force 2: Invaders From Planet Space (PlayStation Vita) | GBAtemp.net - The Independent Video Game Community
Billem Dafoe on Twitter: "Another underrappreciated game shoutout to PSP exclusive, Coded Arms. Randomly generated maps, slew of creative weapons, attractive and unique UI and visuals, and my first handheld shooter multiplayer
Co-Optimus - Review - Earth Defense Force 5 Co-Op Review
Review: Earth Defense Force 2017 Portable (Sony Playstation Vita) | Diehard GameFAN 2018