Tierheit

Not much is known. They had a female president? [1] (Were they originally developing Lunar: Silver Star Story for Windows? [2])

Research Methods: Actual mentions

Famicom/NES

• Pescatore (unreleased) (Sunsoft)

MSX

• Sorcerian (JP Publisher: Takeru [Brother])

MSX2/MSX2+/Turbo R

Sound: RAY-NET

PC-98

• AiZA (co-developed with Lawins) (JP Publisher: Takeru [Brother])
• Chase H.Q. (JP Publisher: Takeru [Brother])

Developer?: RAY-NET

One tweet alleges this was originally supposed to be released by Dexter as Chaser H.Q.. [3]

• The Legends of Lune: Jikuu no Kanata (co-developed with Lawins) (JP Publisher: Takeru [Brother])