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The Diamond trophies require you to score at least 500,000 points in one run and may seem daunting to some at first, but with a bit of patience and good strategy 500k is easy to achieve. Both game modes follow the same basic premise, you face wave after unending wave of enemies until you die. You will fight the DUP in both modes while Survival also throws demons into the mix. The twist for Rescue is you will need to periodically save a hostage and letting five die will end your run.

Survival is the easiest to break 500k in as you only have to worry about fighting and dying, with no additional distractions. Spamming Homing Missiles works surprisingly well for these challenges and it is recommended to have them maxed out before attempting to break 500k. By simply launching out four bursts of fully upgraded missiles and refilling your ammo by draining Neon you can make short work of groups of enemies. Another good tactic is using fully upgraded melee. It comes with a higher risk, but with Mega Finisher you can take out large groups of enemies with one kick. Don't underestimate the value of overloading a turret or Enslaving enemies. Not only will they stop firing on you, they will fight on your side for a brief time.

You should try to keep your multiplier as high as possible. Whenever you see your multiplier start to flash red it's about to decrease so try to get another kill before it does. Be on the lookout for drones flying over head and shoot them down if you have the shot. One of the possible drops is a Multiplier Booster which doubles your current multiplier. If you're already maxed out and pick one of these up you can reach a x100 multiplier. With a high multiplier and a large group of enemies a Neon Singularity can rack up a massive amount of points.

It's also important to know the layout of each arena. Knowing where Neon can be drained and where you have cover is paramount to surviving. Finally, and most importantly, know when to make a strategic retreat. When your screen turns black and white you're about to die. Run to cover and let your health refill or drain Neon to both top off your health and refill your missile ammo.

All of the above also applies to Rescue missions with an important difference. Keeping yourself alive will be the easy part, the hard part will be keeping the hostages alive. As soon as a hostage spawns in make your way to them and save them. This will become more and more difficult as the waves progress so it's important to get off to a good start. If you lose a hostage in the first few waves you may want to restart rather than carry on with a handicap. You are allowed five hostage deaths and need 500,000 points so you want to shoot for at least 100,000 between each hostage death.

The main combat difference with Rescue is that you will want to make good use of Stasis and having it maxed will help a great deal. Hitting the attacking enemies will give you time to take them out. Hitting the hostage with Stasis will protect them against enemy fire giving you an even better chance to save them. Be careful not to hit a hostage with stasis near a ledge as it's easy to knock them off and cost yourself a save.