And now, by release order

>Doom
>October, 2001

Very fitting of Doom to open the ball. This is a port of "console Doom" with some simplified architecture, changed texturing, an entire level (E3M1) completely different, the Spider Mastermind and Cyberdemon missing and a normally secret level in lieu of a boss. People tend to like GBA Doom II more but I enjoyed the first one a lot more because the differences made it fresh. It's still Doom and it has a good engine, good controls and good framerate.
There is no UV difficutly and it goes straight to Nightmare, however it's not the original Nightmare, enemies don't respawn and it's more of a blend between UV, Nightmare and Fast Monsters. Enemies deal a shit ton of damage, Cacodemons are FAST to the point I feared them liked I never feared them before. I don't know if this version of Nightmare exists in the other "console Doom" versions but I enjoyed it a lot, I did pistol starts in the first 2 EPs but then I gave up on that in EP3 because the new E3M1 is obviously not meant for it (you keep your stuff from the previous EP).