i want to find out is there a way to save your game or is it automatic? last time i played i stopped on the first mission at almost the end with the tank, when i put the game in again i had to do the whole mission over again
The game automatically saves progress such as vektan dollars, trophies and weapons bought.... But it doesn't save 'in mission' progress, nor can you as far as I've found out. You can turn off the vita in between a mission, but don't close the game entirely, or start e.g. a multiplayer match while in progress of completing a mission or like you stated... you'll need to complete the entire mission again.
