Alien Breed

There are 12 weapons available for purchase from the in game store, each of which cost 25,000 Credits. You'll need 300,000 Credits to buy them all. If you don't spend too much on extra lives or keys from the store you should have enough before you finish Valiance.

If you're transferring saves back and forth between your PS3 and Vita be sure to back up your save to the Cloud before you purchase the final weapon. If you buy the last weapon before you transfer your save, you won't be able to unlock the trophy on your Vita. You'll need to start a new game and play until you pick up another 300,000 credits.