in, of 'I don't really belong here'. I think Jews are always going to feel a little bit like they don't belong wherever they are. There's always that 'what if we have to flee' mentality." Game engine BioShock uses a heavily modified Unreal Engine 2.5 with some of the advanced technologies from Unreal Engine 3. Irrational had previous experience with modifying and expanding on the Unreal Engine in SWAT 4, and continued this advancement of the engine within BioShock. One significant improvement they added was improved water effects, given the nature of the game's setting, hiring a programmer and artist to focus on the water effects. This graphical enhancement has been lauded by critics, with GameSpot saying, "Whether it's standing water on the floor or sea water rushing in after an explosion, it will blow you away every time you see it." BioShock also uses the Havok Physics engine that allows for an enhancement of in-game physics, the integration of ragdoll physics, and allows for more lifelike movement by elements of the environment. The Windows version was built to work in both Direct3D 10 (DirectX 10) and DirectX 9, with the DirectX 10 version supporting additional water and particle effects. Soundtrack BioShock contains both licensed music and an original score. The licensed music from the 1930s, 1940s, and 1950s can be heard playing on phonograph throughout Rapture. In total, 30 licensed songs can be heard throughout the game. The original score was composed by Garry Schyman. He composed his pieces to blend with the chosen licensed music as to keep the same feel, while also trying to bring out something that was "eerie, frightening and at times beautiful" to mesh well with Rapture's environments. 2K Games released an orchestral score soundtrack on their official homepage on August 24, 2007. Available in MP3 format, the score—composed by Garry Schyman—contains 12 of the 22 tracks from the game. The Limited Edition version of the game came with The Rapture EP remixes by Moby and Oscar The Punk. The three remixed tracks on the CD include "Beyond the Sea", "God Bless the Child" and "Wild Little Sisters"; the original recordings of these songs are in the game. BioShock score was released on a vinyl LP with the BioShock 2 Special Edition. Release and promotion An initial demo of the game was made available in August 2007 for Xbox 360 and Microsoft Windows. This