Yes, the biggest difference is four, 1: two passes are added. 2. Weapon proficiency was cancelled. Moreover, the chip can only insert 1, and can only point to five basic attributes, that is, it can only point to strength "plus 1 blood ammunition capacity" and blood "plus 2 points per point", that is, speed, accuracy and intelligence. 3. The game has obviously lost weight. There used to be 2 G, but now it is only 566Mb, and the effect is similar to 2. 4. The patch of the previous 2 is useless in reloading, that is, new weapons cannot be used.