I suspect we're kindred spirits here Tom!
My programmer back in the 90's was a dude called Kevin Darbyshire, I am still friends with him but I don't get to see him often as I don't live near any more (he was superb!). We decided to make the game in Amos Pro (of all things!). It was great for a while but once the program got *big* the compiler just wouldn't work. Ours was to be a 2-player split-screen Alien Breed inspired game, it became a deathmatch game after we salvaged what would work and moved on.
I am learning Gamemaker to help me realise a lifelong dream of making games (I have a couple lined up for RPG Maker MV too).I have a working prototype of my first ever game and the buzz is incredible...god knows where it will go but I am enjoying learning.
I remember Valhalla! That too was programmed in Amos if I am not mistaken?I am still very passionate about Amiga and the Amiga scene, I am not sure if you are a member of the various FB groups or a member over on E.A.B but I know that the Amiga still has it's fans and it's users andthey're as passionate as ever, especially about new games.
I am currently co-developing a game for Amiga called Scourge of the Underkind. Maybe yuou could reconsider returning to the scene oneday? :)
Great to meet you out here in the 1s and 0s of the internet.
:D