Battletech:The Crescent Hawk's Inception doesn't end with a boss battle, in fact the game doesn't even really have "boss"battles. The final section is discovering a hidden base the MC's father had left behind that contained a cache of Star League era Mechs and gears, which you could use to rebuild the Crescent Hawk Battalion. The whole sequence is actually a puzzle trying to get around the security which wasn't lethal, just cut off access to where you needed to go.