Rob Green succeeds in generating a considerable degree of suspenseful tension. He has a fine ability to draw excellent characterisations out of his actors. (That is if one is prepared to extend the film the slight improbability the film asks of us in seeing German soldiers talking with various provincial British accents). The central menace is kept shadowy and the film hovers in an ambiguous place between whether it is zombies, the resurrected dead from the Middle Ages or the more mundane menace of the Americans having invaded the tunnels. In many senses, The Bunker is a Val Lewtonian film. Lewton was a producer in the 1940s who made films such as Cat People (1942) and I Walked with a Zombie (1943) where he specialised in a unique psychological ambiguity where the films hovered in an uncertain place between supernatural and mundane rational positions. The Bunker is certainly Lewtonian in this sense.
However, where The Bunker fails to work is in its eventual payoff. One can see what Rob Green was trying to do but the eventual resolution where the film seems to suggest that the soldiers are being haunted for their execution of deserters seems weak and uncertain, ruining a good build-up. Unfortunately, in the unusual position that the film takes the point-of-view of German soldiers it is hard to feel particularly horrified about the idea of the group being haunted by deserters they executed when one is confronted by the actuality of history where German soldiery massacred entire towns for standing up against them, hung protestors from lampposts, brutalised the elderly in the street with rifle butts, not to mention the entire body of atrocities that occurred in the concentration camps. Now, if the film had had the soldiers being haunted by any of these things, it would have had some bite. As it is, it seems tame. One feels that if you want to use Nazis as characters in a film, you had better justify the use of them as they carry a great deal of loaded imagery. One also has the suspicion that The Bunker might have worked better if the parts of the soldiers had been rewritten as British (perhaps during World War I), which would not have taken much effort to do. While the British did shoot deserters during the Great War, there is the sense that it was a just war and the idea of soldiers being haunted by guilt over their actions would have far greater effect.
Rob Green has yet to direct another film. He did write the haunted house film House (2008) and the science-fiction film Scintilla/The Hybrid (2014).
Full film available online here:-