Alpha Mission review. Classic Game Room reviews ALPHA MISSION, a Playstation Mini for PS3 and PSP from SNK Playmore. Alpha Mission is a 1985 arcade game from SNK where players pilot a space ship against waves of enemies! Shoot bad guys with lasers and bomb ground targets in this challenging old school vertical scrolling SHMUP on PS3. Collect power ups with letters that enhance your space ship with special weapons or take away speed and power.