I don't think he was non-specific. He asked what were good maps 'in the style of official KF maps.' Both visually and in terms of gameplay.
Graphics we can lay aside because the gap between high-quality maps and amateur maps is pretty obvious.
Official KF maps generally follow one game play principle: No area can be reduced a single point of entry for specimens. The only map that fails this test is Bioticslab, and only because of how pathing works vs. that single welded door. All other maps, in any area you can be attacked from at least two angles, and usually it's way more than that. They took this principle even farther with KF-Foundry, where you can be attacked from as many six angles when you're on the ground floor.
I've seen plenty of fan-made maps that violate this principle. Whether that's fun or not....that's up the player to decide. But if the question is which maps are closest to TWI maps in terms of looks AND game play....this is not a subjective answer. You can clearly describe maps that don't challenge the players like official TWI maps.
And not to bash KF-Defense....but it stands out to me. You have murder holes next to weldable doors, and llooooooonnnnnggggggggg stretches of open area to pick off specimen, and loooooooonnnnnggg corridors on the ramparts where you can funnel the specimen, and the lighting leaves nothing to the imagination so nothing sneaks up on you. You won't find those characteristics in any official TWI map, except Farm, which still challenges you with a night environment and plenty of cover for the specimen.
And to note...I like playing Prison now and again. Sometimes you just want to camp and watch stuff explode. I'm not knocking maps that build areas specifically for camping....but they are definitely less challenging.
