hmm, well lets see...
there's the three valve maps that come with HL2DM
dm_lockdown - good map that is hurt by the tight as f**k doorways and hallways, the connectivity is a little weak due to being mainly one level and having too much sprawl, the big showers area is alot of fun though
dm_overwatch - terrible connectivity between the levels of the center building, holding the camp spot up top with the rocket launcher determines the winner every game, and the bottom floor of the building becomes a bloodfest due to the overabundance of props and too many player spawns close by
dm_steamlab - remake of datacore from HLDM, a good HLDM map with good connectivity but has problems with props due to its enclosed nature
dm_torque (ignore who made it :eek: ):
http://www.snarkpit.net/maps.php?map=1543
- there's too many props in the map, the architecture is terrible, and it supposedly ran poorly for people when it was released due to how open it is, but for connectivity and vertical combat I know of nothing better. It's basically overwatch done right, plenty of action from every direction and both props and weaponry are effective. but I am biased :/
dm_np_refinery:
http://www.snarkpit.net/maps.php?map=1654
- architecture style is very unique to this author, and he is one of the HLDM greats, just don't try copying it. Very fun map and well polished.
dm_island17:
http://www.snarkpit.net/maps.php?map=1580
- very fun map, not as much prop combat due to the very open nature of the map. Had performance issues back in the day as well, but I never noticed them. Sniping at the top of the lighthouse is nigh impossible.
dm_rebar:
http://www.snarkpit.net/maps.php?map=1412
- one of the best weapon dominated maps out there. I complained about the lack of props when it was released but variety is the spice of life.
There's got to be more but I haven't played HL2DM in some time. There's also the contest winner maps that I assume you have. I don't remember the names but two of the three are absolutely horrible and the other is a UT reject that plays ok but with a lack of props.
how to not make a dm map can be highlighted by
dm_morbid:
http://www.snarkpit.net/maps.php?map=1579
- terrible connectivity and zero flow, you basically have a linear path from anywhere you spawn and that makes gameplay slow and flavorless. Running around in circles is about as fun as it sounds. Classic example of graphics over gameplay (cause it looks fantastic)
as for general HL2DM mapping:
-never use ladders, valve changed them in HL2 and they suck ass
-avoid putting the contact grenades and the smg near each other
-avoid putting the 2nd fire orb things and the overwatch rifle near each other
-try to balance props and weapon usage throughout the map, too many physics props piss people off and get in the way and if there's too few you are basically playing a slower less fun HLDM
-I found it best to put small physics objects in tighter areas and bigger ones in the larger open areas
-the best props for general throwing are radiators, buzzsaws, sinks, and toilets. Tables and desks are good in open areas but are tough to use if you are running around. Barrels suck, and explosive barrels can get annoying. Death by watermelon is the ultimate insult kill.
because of what you start with in HL2DM (smg, grav gun, last resort pistol, crowbar, and grenades) basically everyone has three different combat options available, so it's important to allow all of them to play to their strengths and player taste. That means having close combat areas, open areas, some props within reach, etc.