Metro 2033

To get this Achievement once you have arrived at "Cursed Station" and have been sent to destroy a tunnel and shut an Airlock, you need to.
A. Stand where the guards are and look in the direction of where the Nisalises are coming.
B. Follow the wall to the right, remaining in the middle section (don't go where the platforms are)
C. Look for a staircase leading up on this wall.
D. Go up the stairs and you'll see a gate type structure. (I believe you have to wear a gasmask) On the side to the left is a flashing marker. Activate this and run. (or you'll die)
E. Find the Demo team. (Go on the right tunnel to the end) And get the bomb
F. Go to the bottom of the left tunnel and plant the bomb.
G. RUN!

Hope this helps!

This is an story related achievement you'll get this while
progressing trough the game.

I've found a video on YouTube to help you on your way.

Video credits goto jellyalv on YouTube.

P.S this is also a good location to get the following achievement:
- Slice & Dice [Kill 20 enemies with the knife.]
- Ninja [Kill 10 enemies with throwing knives.]
- Cowboy [Kill 30 enemies using revolvers.]
- Nosalis hunter [Kill 30 nosalises.]
- Old school [Kill 30 enemies with the double-barreled shotgun.]
- Heavy Metal [Kill 15 enemies using stationary machine gun.]

A tip for the Ninja achievement here: if you throw a knife, then
you can re-use it by picking it up again or by pulling it out of your
victim.

This is one of the best achievement boost locations of this game,
because the monsters/Nosalises will spawn infinite until you've
blown up the tunnel and airlock. So if you take your time, then
you will be able to get seven achievements in this section.

Have fun hunting and be patience here, you will be rewarded well.

When you are at the "Cursed Station" you will be tasked with destroying a tunnel on the left, before doing this, go to the right.(From where the guards are, looking towards where the Nosalises come from.) There will be a large opened airlock, place a bomb on one of the three wooden supports, then continue to blow up the left tunnel, you should get the achievement immediately.