Half Life 2s Episodes both ended with an epic boss fight against a Strider, or in HL2s case against a dozen freaking striders, with freaking Hunters guarding them.
The Episode 2 final battle is easily one of my most favorite parts in any video game. Not technically a boss fight, but it still counts.
Also, the Metroid Prime final bosses are so epic and fun.
yeah the episodes both had pretty cool final battles.
I was only talking about HL2 itself, in which there is basically no boss fight, just chasing Dr. Breen upwards and then throwing a few energy balls at the portal thingy, and I'm saying that there's nothing wrong with that.