Metro 2033 PC Cheats
I Can't Find the Bomb
In 'Cursed', Artyom is tasked with destroying the tunnel and airlock where the nosalises (mutants) are spawning from.
Position yourself so Khan and the defenders are behind you for the following directions:
The bombs are at the end of the right tunnel.
Destroy the left tunnel by "using" the glowing bomb hologram on the tunnel supports at the dead end.
Destroy the airlock by going up the stairs and using the bomb holographic on the supports. The stairs are to your right (and a little forward), if you are standing with Khan and the defenders at the station's entrance.
Tasked with an S.O.S. message from "Defense", you complete this objective in "Outpost". Enter the first Nazi controlled building (the one where a Demon snatches a fleeing Nazi in a preset condition) and battle through it.
Get yourself on the upper level of that building. On the upper story, there is a hallway with three tripwire mines (and two Demons who are easily exploited for the Demon killer achievement). Navigate through the mines and check the right room at the end of the corridor. There is a ramp leading to the rooftop.
On the rooftop, you should see a pre-set corpse with a Kalashnikov. The communications apparatus is on the corner of this rooftop.
God Mode and Infinite Ammo
Alter game files at your own risk and always make backups. Navigate to the game folder, find the user.cfg file and open it in a text editor. Change the following lines and save changes for the desired effect.
Change g_global_god off to g_global_god on and change g_god off to g_god on for God Mode
Change g_unlimitedammo off to g_unlimitedammo on for unlimited ammo.
Moral Choice Indicator
While there are obvious moral choices in the game (where both decisions are obvious), there are more subtle moral choices that will determine which ending (just two) you get at the end.
When choosing an action, the game world will temporarily flicker with a rust-ochre color (and you will hear faint murmuring) if you made a moral choice (good or bad).
Preventing Accidental Ammo Discharges Hand Over Fist
When pumping the Tihar (Pellet Gun) or the Hilsing (Spear Gun), you can accidentally discharge ammunition when the animation resets to "fire mode" (because the primary fire button or Right Trigger also works the air pump).
Apparently, the game doesn't tell you the Alternate Fire (or Precision Aim) also works the air lever. If you use the Alt.Fire or Left Trigger to work the air pump, you will not accidentally discharge any ammunition until you are ready (the Tihar and Hilsing only have aim-down-sight for secondary fire).
Decline the kid's offer to lead you at Riga Station to earn this secret task.
In the Library, the two rangers accompanying you will read through the titles of several books, including one called Roadside Picnic (1977) by the Strugatsky brothers.
The book was the basis for Andrei Tarkovsky's 1979 film STALKER, which in turn was one inspiration for GSC World's 2007 videogame of a similar name: S.T.A.L.K.E.R. Shadow of Chernobyl.
Sneaking and Armored Suits
At Armory Station, before climbing into the train car, you can purchase a Sneaking Suit for 100 military cartridges from the vendor across from the Ammo Exchange.
Note that the vendor next to the Stealth Suit vendor sells an Armor Suit which will decrease the damage Artyom takes (both suits can be worn, but only the last one visibly reflected on the body model).
At Polis, a vendor next to the Ammo Exchange sells a similar Armor Suit (same price as the other suits).
Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.