If you're a true shoot 'em up fan then playing 1917: The Alien Invasion DX will just make you mad. With a completely broken scoring system and a super-tedious campaign that plays like Simon Says, it's hard to imagine who would actually enjoy this.
Summary1917 - The Alien Invasions is a bullet hell memorization shooter. Dr. Brunhild Stahlmüller upgrades an WW1 Triplane with superior alien technology to attack the invaders. She will avenge mankind and take the battle into the darkness of space until she reach an ancient alien world.