[SPOILERS] Are there multiple endings?

[Gabeux]

Hello everyone.

Just finished the game 100% and was wondering, are there multiple endings?
Don't read below if you haven't finished the game:

I imagined from the beggining that Kovac would be the final boss and that he made everyone crash in the island and all that, but I didn't get to fight him and boarded the plane. The ending is kinda sad, and left me thinking if there is a way to actually kill him.
Also, the crippled guy being on his side got me by surprise.

[ImpJack]

I got the same ending too.

[lolacampe]

Kovac is the ultimate survivor, i think you can't kill him.

[Gabeux]

Surviving and fighting are two completely different things. Also, somehow he controlled the zombies, so I don't think he would handle the protagonist in combat.
Maybe in the part you have to survive while the plane is getting started, there could be a way to find and kill him, then get back on the plane. That would be the good ending.

Also, I believe that there should be an ending on that part where you find the girl locked into a hut, instead of going to save her and her mom, you could have the choice to leave everyone behind and take the boat (Kovac said you could leave on his boat). Something bad could happen, like the boat exploding, killing the protagonist. May sound weird, but there are other games that provide this kind of possibility to the player (be an idiot. and die.), heh.