Looking for old browser alien shooter game

This was an old game browser game that had had you as a solider fighting aliens. It was a first person game but it also had aspects of path selection, different weapons and boss battles. One of the boss battles had you breaking parts of the boss' arms and legs to progress and another one was a spaceship in space. I think there was also sequels 2 and 3 of this game. If anyone has a clue post it in the comments!