Alien apocalypse is too plain and generic, I prefer something dark and sinister, probably the name of the protagonist, or a word that describes the state of the world. To give more context, the storyline is fairly straightforward, in a post apocalyptic world, a hostile alien race lands on earth and wants to take it over from the humans, the humans fight back, but in the process our human protagonist has to traverse dangerous terrain full of giant mutant insects and other mutant animals to reach the landed aliens, but the levels will be very long and full of puzzles so you may say the game will be more gameplay driven than story driven.
Viewing post in What to name our new game?
Doom.
Checks all your requirements. Oh, wait. You want a new name, don't ya. Hmm. Let's see, you do not want a plain and generic name, yet you want a simple name, like one, maybe two word. Does your bland and generic cookie cutter plot give any hints? How about Space Invaders? Or simply Aliens. That would be a clever word play, since the mutant insects are just as alien as the extra terrestials. The hero or his grandparents before the apocalypse could have lived in Cloverfield Boulevard, so name the game Cloverfield.
But to be more serious and less joking, unless you call it the equivalent of Snakes on a Plane and get very, very lucky, the name of the game will not make the game any good. You can't just call your game Destiny or Borderlands and boom, AAA game. None of the good or bad titles are inherently any good. It is tons and tons and tons of marketing that gave the hitherto bland and generic name a meaning. Or being very first and genre defining, in other words having success. Quake. Pah. That's just a bit of shaky ground. Far Cry. That is a long distance. Yet you know it as a ego shooter series. Same with GTA. That's a mere legal name for car stealing.
Name the game Tattorn. Whatever that means. The internet only spews out your sport games for that. So make the hero be named Tattorn and mildly plot twist the hero to be a women, but you can't see it at first, because of the garb worn because of the postapocalyptic. It could even be hinted, that the protagonist is a mutant or alien or robot. After all, what good would it do for the hero to reach the aliens? If we can't even house keep our postapo world from insects, how could the hero even dream of fighting against space faring invaders. Lure the bug queen to the mother ship? Or by being super powered mutant robot? How are the aliens even supposed to take away the world, apparantly it is controlled by the mutant insects and not the humans. So the aliens are actually here to fight the rulers, the insects.