The game system ties in with Walker's novel World at War: Revelation, which tells the tale of the darker side of the war, mixing military adventure with  elements of horror and paranormal events.
ðə ɡˈeɪm sˈɪstəm tˈaɪz ɪn wɪð wˈɔːkɚz nˈɑːvəl wˈɜːld æt wˈɔːɹ: ɹˌɛvɪlˈeɪʃən, wˌɪtʃ tˈɛlz ðə tˈeɪl ʌvðə dˈɑːɹkɚ sˈaɪd ʌvðə wˈɔːɹ, mˈɪksɪŋ mˈɪlətˌɛɹi ɐdvˈɛntʃɚ wɪð ˈɛlɪmənts ʌv hˈɔɹɚ ænd pˈæɹənˌoːɹməl ᵻvˈɛnts.