Please add the following:
Blam!, the developer of "Monkey Hero" for the PlayStation.
Re:
https://en.wikipedia.org/wiki/Monkey_Hero https://www.gamefaqs.com/ps/197970-monkey-hero/data https://boardgamegeek.com/videogamedeveloper/17669/blam-video-game-developerSonnori, the developer of "Astonishia Story" for the PSP
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https://www.gamefaqs.com/psp/929281-astonishia-story/data https://en.wikipedia.org/wiki/Astonishia_StoryBuzz Monkey Software, developer of "Tomb Raider: Legend" (aka, unofficially, as "Lara Croft Tomb Raider: Legend" by some people). Also, developed "Tomb Raider Underworld" for the Wii, "Army of Two: The 40th Day" for the PSP, and several other titles.
Re:
https://en.wikipedia.org/wiki/Buzz_Monkey_Software https://www.gamefaqs.com/psp/926820-tomb-raider-legend/data https://en.wikipedia.org/wiki/Army_of_Two:_The_40th_Day https://www.gamefaqs.com/psp/959060-army-of-two-the-40th-day/dataFelistella, developer of "Summon Night 3", "Summon Night 4", "Summon Night 5", et al.
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https://en.wikipedia.org/wiki/FelistellaKadokawa Games and
Kadokawa Corporation developers of "God War: Future Past" (Vita, PS4), "RPG Maker Fes" (3DS), "Natural Doctrine" (Vita, PS3, PS4), "Root Letter" (Vita, PS4), any many more.
Re:
https://en.wikipedia.org/wiki/God_Wars:_Future_Past https://en.wikipedia.org/wiki/Kadokawa_Corporation https://www.gamefaqs.com/company/44173-kadokawaHellbent Games, developer of "LEGO Ninjago: Nindroids" for PSV & 3DS, "LEGO Friends" for NDS & 3DS, "Supreme Commander" Xbox 360 port, et al.
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https://en.wikipedia.org/wiki/Hellbent_Games http://hellbentgames.com/games/Otomate, a subsidiary of Idea Factory that developed otome games for the PSV such as "Bad Apple Wars", "Period: Cube", "Collar x Malice", Hakuoki: Edo Blossoms, Code: Realize Future Blessings, et al.
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https://en.wikipedia.org/wiki/Idea_Factory https://www.gamefaqs.com/company/94839-otomateSushi Typhoon Games, developer of "Tokyo Tattoo Girls" for PSV & PC.
Re:
https://en.wikipedia.org/wiki/Tokyo_Tattoo_Girls Their logo also appears on the PSV artwork.
Confounding Factor, British developer of "Galleon" for Xbox.
Re:
https://gamefaqs.gamespot.com/company/12701-confounding-factor https://en.wikipedia.org/wiki/Confounding_Factor_(games_company)
Plus, artwork states "...developed by Confounding Factor Limited."
Hidden Floor, developer of "Back to Stone" for GBA.
Re:
https://en.wikipedia.org/wiki/Back_to_Stone Plus, their name appears on-screen during gameplay opening credits.
Codo Technologies, developer of "Rebelstar: Tactical Command" for GBA.
Re:
https://en.wikipedia.org/wiki/Rebelstar:_Tactical_Command https://en.wikipedia.org/wiki/Codo_TechnologiesTaniko, LLC, developer of "Masters of the Universe - He-Man: Power of Grayskull" for GBA, et al.
Re:
https://en.wikipedia.org/wiki/He-Man:_Power_of_Grayskull https://www.mobygames.com/company/taniko-llc https://gamefaqs.gamespot.com/company/76046-taniko