I suppose I've either read them or at least seen the covers.

I had a look through the checklist on the site when I joined and the ones I'd never seen before, such as this ROM cover, I took extra interest in.
Guess they stuck in my head such that a bit of memory and reasoning along the lines of "Hmm... figure with gun, who could that be?" means I have a fighting chance of guessing them.

I certainly don't know 'em all though!
Love this game especially when it throws up a cover I haven't seen before so thanks to everyone posting the puzzles.
If I can get a bit of spare time I'll have to try and do some 'stick figuring' of my own.