Due to the layout of the map with all three rooms within very close proximity and well connected I find that a cyclic route round the map works very well. Regardless of where you spawn you should try to stay away from the ground and trench levels at first because these tend to leave you more open to attack. You should always be thinking about getting to the Grenade Launcher platform in room 1 so you can grab the Red Armour and maybe take out a few opponents trying to get the Rocket Launcher. If was to spawn at ground level in room 1 this is probably the route I would take. First get away from the ground level and head up the stairs to the lower level. Grab the Super Shotgun and head off into room 2. Be sure to pick up the Rockets and Slugs in the short connecting corridor between the two rooms. Snatch the Railgun and if you took a few grenade hits in room 1 you might want to carefully drop onto the pipe and the Adrenaline. If anyone is emerging from the pipe to get out of the trench then put a rail through their head. Still on the lower level head toward the switchback corridor to room 3. You might as well grab the Machinegun while you are there in case you run out of slugs or shells. Once in room 3 head straight toward the upper level of room 1 via the wide staircase in the corner. Be sure to pick off anyone who is milling around at ground level. Grab the Grenade Launcher and clear out the trench if anyone if attempting to get the Rocket Launcher. Once it's clear drop down, grab the Red Armour and then drop down again into the trench to swipe the Rocket Launcher. Once in the trench you are in a precarious position so head straight for room 2 and the exit. Like I said, there are numerous routes through the map but I would recommend you limit your time in the trench and at ground level to increase your chances of survival and therefore victory.

Weapons

As usual, both the Railgun and the Rocket Launcher are highly effective on this map. The existence of the trench throughout the map also means that the Grenade Launcher can get you plenty of kills. All three rooms are large and open so this is where the Railgun's strength lies. Skillful players can use the plethora of pipes to provide cover from Railgun snipers. The Rocket Launcher comes into its own when attacking from above which is a regular occurrence in the map. The Super Shotguns are useful when you run into somebody in the short connecting corridors and the Chaingun and generous supply of bullets is great for finishing off crowds of weakened players fighting in room 3.

Getting About

There is plenty of opportunity to take shortcuts in KTDM1, here are just a few. One of the most useful is made in room 2. To avoid having to use the pipe ladder to exit the trench you can jump onto the lip surrounding the entrance and then up onto the ground level possible fooling nearby Railgun snipers. Furthermore you can also use the lip surrounding the pipe in the ground floor to ramp jump either across to the horizontal pipe near the lower level exit to room 3 or to the thin collar on the vertical pipe in front of the Railgun. From both of these positions you can then easily jump up to the lower level. This save you having to use the stairs in room 3 to get to the Railgun. The second of these two jumps is much more difficult to pull of but is also much more useful. I like to use it if I am being persued in room 3. If timed correctly you can run into room 2, jump up onto the collar and up to the Railgun, grab it, turn and rail your opponent before he realises what happened :-) Of course you can rocket jump easily between most levels but this is only really useful in two areas. First you can rocket jump from ground level in room 1 up to the Grenade Launcher, useful for heading off an opponent or quickly grabbing the Red Armour. The other main use for rocket jumping is to escape the trench. If you are being bombarded by grenades from above you can surprise an opponent by simply rocket jumping out and proceeding to eject a rocket into their face. Very satisfying.

Extra Tips