Alien Soldier is a 2D run and gun game set in 2015. The world is ruled by the terrorist organization Scarlet, because it includes genetically modified creatures. They blocked the inhabitants of the planet the possibility of access to open space. However, as a result of a covert operation, people managed to neutralize Epsilon-Eagle - the man who previously led the Scarlet group. While Epsioln was imprisoned, Xi-Tiger took advantage of this and organized a group of even more dangerous terrorists.
The gameplay of Alien Soldier stands out in that there are so many unique bosses. For the entire time of passing you have to fight with 31 unique leaders in 25 stages of the story campaign. Some levels do not have regular enemies, but are represented only by a series of bosses. The dynamics of the gameplay is very high and is partly borrowed from Gunstar Heroes, from where two bosses migrated - Melon Bread and Seven Force. Epsilon, for example, can teleport, block attacks, run across the ceiling, and much more.
There are 2 difficulty levels available: Supereasy and Superhard. On the latter, cheats cannot be used and the hero does not have "continuums". In other words, the game lasts until the first death. After passing, statistics are available that show your victories, the number of defeats, etc. The highest score is given for the total playing time.