This level is an EXTREMELY HARD level to do on insane cold start.
The komodo near the exit often comes out and bangs the grate below killing the player with splash damage.
When you manage to pick up the the blue key and open the blue grate, there are 2 fulcrums that rush out from that door right away you open it, and they cannot be stunned by firing at them, you need to go back to the starting where the komodo and 2 legionairre waits you to bang the grate and damage you with splash damage while you try to shot down the fulcrums.
Pure luck based situation. And I die 9 out of the 10 cases from the splash damage.
After you manage to get the secret invulnerability in the blue area, it's barely enough to pick up the yellow key and rush in to the yellow area and kill everything inside.
Once you get past these situations the rest of the level becomes more predictable and learnable.
In the red area the 2 golems and the hostage door can be destroyed from safe distance, then the cloaking device can be picked up to sneak in and clear the restance from that area, the reactor can be sniped through the grate in the secret 2 and the invulnerability there lets the player to back out when the reactor blows up.
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