Killzone and Killzone 2 were drab, bleak affairs. Killzone 3, on the other hand, dared to add a little colour to the series, a decision that paid off in the end.
I never really had much time for the first two games, but I really liked Killzone 3, and I think at least part of that turnaround was due to the fact the game took place in a variety of environments, which helped break up the soul-crushing monotony of seeing wrecked street after wrecked street.
This concept art for the game, drawn by Jesse van Dijk (who works for Killzone developers Guerilla Games), takes in four of the main environments players visit over the course of the game, and even makes the dead city of Killzone 2 look pretty.
Oh, and while we're on the subject, also included in the gallery is a short trailer showing some of the behind-the-scenes work captured by Rainfall films. Those with the collector's edition of the game will have seen it all before, but those who haven't, enjoy.