Time to get fucking serious

https://www.youtube.com/watch?v=11GRSMvhRn8

• Save the MG for the Marsh Hopper wave.
  
• You may feel urged to go into the bends at times, especially on the Mars Hopper wave, but do not do that, you don't need to and you're just likelier to die there.
  
• You only need to survive for a few more seconds when the Harpie wave begins, don't bother killing the Reptiloids here, use rockets or grenades on the bull though, and use the rest of your MG rounds on the green balls.