Metro 2033

- Take your time, explore, soak up the atmosphere. It rewards exploration and you're missing out if you don't poke around - especially in the stations.

- The revolver is a very reliable weapon and can take you through the entire game, though not worth silencing. If you're killing people stealthily the throwing knives are a much better option anyway.

- Listen to NPC chatter. Seriously: the stories they tell are absolutely beautiful at times, and really draw you in.

- Early on you get a chance to spend some time with a prostitute. Don't do this unless you want to lose all your money.