Alien Soldier is a really cool game, and feels very ahead of its time in a lot of ways. The game's kind of difficult to get into because it just dumps you straight into things without much explanation, but once you actually start learning the systems of the game all of your abilities and weapons are really satisfying to use. Boss rush games don't really seem like something anyone was doing back when this was made, and it mostly does a really good job at it aside from some weird difficulty spikes. Stage 20 is brutally difficult and the few after that are kind of anticlimactic because none of them were anywhere close to as difficult, I even first tried the final boss (which was not very good imo). That aside though, really cool game overall, I could see coming back to this and trying to complete a Superhard run sometime.