So here is the screenshot from walkthrough (it's Xbox 360 walkthrough):
http://i.imgur.com/JOw8l.jpg
You can see that textures are normal, and here is photo from my game (sorry for bad quality):
http://i.imgur.com/zpbcm.jpg
You can see that buttons on keypad are not even round, texture quality are horrible. Almost all textures in my game are low res like on this photo. I call my friend and asked him if he experiences same problems, and yes, he is, but he already complete the game and he thought that this is normal textures. He was playing game from HDD. I play it from flash drive, i tried to delete it and play from disk and textures were still low res. Please help me.