I'm surprised no one has said thq. They had so many bangers

GoD Games

SSI for Dark Sun. They merged into Mindscape which then dissolved according to Wikipedia.

Quintet for the Soul Blazer/Terranigma/Illusion of Gaia trilogy. They just kinda disappeared in the early 2000s.

Ambrosia probably provided me the most hours of gaming entertainment over the 90s. They published Mac software and, if I remember correctly, most of their games were shareware and the non-paid versions were pretty well featured.

I wonder how many hundreds of hours I played Escape Velocity and Escape Velocity Override. Those were some absolutely amazing games and they supported plugins (mods) and had a thriving mod community.

For the 90s mac users, you’ll probably recognize a lot of their games (listed on the Wikipedia page). Here are some from the 90s that stand out to me:

Maelstrom

Chiral

Apeiron

Swoop

Barrack

Escape Velocity

Avara

Bubble Trouble

Harry the Handsome Executive

Mars Rising

EV Override

Ares

Escape Velocity Nova

DMA Design and Stainless Studios.

Treasure! Dynamite Headdy, Gunstar Heroes. Bangai O. Not to mention the shmups. Damn they made some amazing games with super cool mechanics. Last I checked, they made a few anime tie-in games or something in the 2010s, but nothing since then.