I have seen many of people complaining about RAZE's 26th level. I still have yet to beat it myself, but I have gotten 1-3 kill left many of times. Below are hints that will help you if you can't get close to winning.
~Aim for the human, unless you see a robot with little health. ~Don't chase a robot with a Railgun. ~Try to get the 2x damage modifier at the top. ~Don't die because I notice that most of my team's deaths are from me. ~Keep the Railguns away from the enemy because they kill you in one shot. ~Keep your cursor near your player because you will get less lag. ~Pick up the health packs on the top corners in the elevators, even if you don't need them because the enemy will use them. ~Try to dodge grenades because these kill you in one shot 95% of the time. ~Try to combine the Grenade launcher or the Railgun with the 2x damage multiplayer. ~Try to back up teammates with low health if they are being shot at by an Uzi. ~Use your best weapon. Note: You also need to have good aim to.
If you have, any other hints feel free to add them to the list. I will add more if I find some. Last, add feedback about hints for level 26.
You should listen to firetail_madness. he's got really good hints.
~stay under the elevator and kill as many people as possible. when your low in health, just jump up and get the first aid. ~never ever try and be cool by facing off the robots. i consider that suicide. ~the railguns are really bad for you unless you use it against "human" ~collect the railguns so the robots can't get them. if they do, your in BIG trouble.
you know the die and stay dead thing? well, that could help on really easy levels. sometimes..... if you mates aren't crappy. but for this specific level, it's NOT a good idea.