Hamster announced the release date of the PS4 version Alpha Mission II which will be available in Japan from December 26, 2016.
In Japan the game is called “ASO II: Last Guardian” and it will be available as a download only title from the JP PSN for 823 Yen (with tax).

It will be the official port version of the 1991 released game, reproducing the atmosphere of the CRT TV gaming. If you are looking for a retro STG title grab this game!