Unit 4 - Level 1 - Mine Entrance

The object of this level is to make your way to the mine entrance. 

U4L1W1

Before you pummel through these hallways, look behind you to snag some shells, bullets, and health. Continue along and exit the door to the outside.

U4L1W2 (strategy)

Peg off the guards first and then work on the Beserkers with the chaingun or hyperblaster before they get to you. Pick up all the health and ammo outside before you head off to the doorway on the right. If you drop down into the corner (just below the doorway to the cave entrance), you’ll find a ledge holding a power shield and some health. Quickly run across the lava onto the shallow island and back onto land - if you do it right, you may only lose five health points or so.

U4L1W3 (secret)

Enter the doorway to the right (you won’t be able to enter the big door outside), and take out all opposition. Pick up the machine gun and continue along the pathway to the jacket armor. 
Shoot at the red wall just to the left of where the armor is to uncover a secret - a missile launcher! The moment you snag this weapon, expect a swarm of Flyers to deal with but don’t use your new toy on these fellas. Continue along the path and shoot the guards on the walkway below you to the left.

U4L1W4 (strategy)

Head on inside but watch for the guards and Beserkers - their mighty blows may cause you to fall into the lava. Walk backwards, while trying to remain conscious of the walkway architecture.

U4L1W5 (strategy)

Once inside, tackle the Beserkers, and then turn to the left and shoot at the gray crate to disembowel the guards. If you didn’t blow up the explosive containers, then push one of them close to the upper ledge and hop up. If you did destroy them during your bullet exchange, head back outside and look down to the walkway on the right where the guards were. Jump across and climb the stairs and exit the door with the Invulnerability symbol on it. You are now on the elevated area on the inside.

U4L1W6 (strategy)

Exit the door to the left, while shooting down the guards and any Icarus floating above you - the hyperblaster makes for a great weapon here. Make your way around the left side of this cylindrical wall and destroy the two Icaruses. Turn around to gib the Beserker and collect the weapon, health, and ammo from behind the explosive crate.

U4L1W7

Climb down the stairs and enter the cave door at the bottom.