I would like to give a shoutout to Covert Action that I played on my 286DX 25MHz/ turbo 33Mhz.
Is that top one Altered Beast?
I don't definitively know the very first game I played, I just remember it was on the ColecoVision at my grandparents' house. (My grandfather was an OG.)
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Taking an educated guess, it was probably...
"Mouse Trap"
or
"Mr. Do!"
I played the hell out of those two games when I'd visit.
Note: My grandfather gave me his ColecoVision. I've got it hooked up to my beastly 36" tube TV in my retro gaming den.
To me, video games have a dividing line - at 64-bit. So when I'm asked about favorite, I kinda have to give two:
My pre-64-bit favorite of all time is "Super Mario World".
My 64-bit+ favorite of all time is "Skyrim".