Here is the full list of all 20 HEIANKYO ALIEN achievements.
Play 5 times.
Play 3 times.
Name entry in arcade mode.
Startup the game and...
Find music then you can select 2612 in Title screen ...
Made super hole in GEA 41381
Get special bonus.
Reach combo 9
Reach Lv.50.
Reach Lv.100.
Reach Lv.200.
Over 1mil score.
Over 5mil score.
Over 10mil score.
Reach x9.
Get diamond when score is 0.
Play 10 times.
Play 20 times.
Play 50 times.
Play 100 times.