7 secret aliens that are insanely hard to find

Fallout 3 offers plenty of alien action with the Mothership Zeta DLC, but that's not my focus here. Wasteland explorers can actually find the mothership landing spot in the main game--a crash site on the north end of the Washington, DC map. Next to the wrecked UFO is a dead visitor. You can't interact with him, but around him lies a powerful Alien Blaster and tons of ammo. Score!

Then there's Fallout: New Vegas, which steps up its alien game with living specimens. If you have the Wild Wasteland perk equipped, you can head just north of New Vegas to find a trio of aliens--and by the way, they will totally kill you. The aliens and their captain fire powerful Tri-beam Laser Rifles, so use caution if you decide to pay these guys a visit.

Grand Theft Auto 5 is packed with Easter eggs--not to mention some UFOs of its own. Smoke a bit of fun fern as Michael, and you can even do battle with invading aliens (newsflash: it's a hallucination). But if you look carefully, you can find an actual, non-hallucinogenic alien in the game's opening moments.

The "cold open" of GTA 5 is a bank robbery in snowy Ludendorff, North Yankton. Like all good robberies, this one ends with a high-speed escape from the cops. But instead of driving across an icy bridge, you can pull over and investigate the frozen water underneath. You'll need to act fast, as getting out of the car quickly ends the mission. Move hastily enough, though, and you can spot an alien frozen in the ice. How did he get there? Why did he come to North Yankton? Who knows, man. Maybe it'll make sense after another puff pass.

If there's one genre that defines the Nintendo 64, it's collect-a-thon platformers. Titles like Super Mario 64 and Donkey Kong 64 sport tons of collectibles and little knickknacks that open up more levels. The Banjo series is the poster child of this type of platforming gameplay, and if you don't complete several steps--like saving an alien family twice--you'll finish the game, but miss hours of other content.

It all starts in the game's water level, Jolly Roger's Lagoon, where you can find a sunken UFO. Once you obtain the Talon Torpedo move--which lets you rocket forward while swimming--you can enter the sunken space vessel. Power it up, and the aliens can return to their voyage. But here's the trick (because all of that that wasn't weird enough)--if you don't do all of that, the aliens won't show up in the later Hailfire Peaks level, and you won't be able to save their dying alien kids. And unless you're a heartless bastard, you will save them.

Final Fantasy has its share of weird creatures--giant golden chickens, lions with snakes for tails, cactuses with eyes... It almost makes sense that an alien would show up at some point. Oddly enough, this Sonic Adventure Chao lookalike's name is PuPu. Before you ask, he is not found in a toilet like the Outlaws aliens, despite his unfortunate name--but I like the way you think.

There are four special battles you can encounter in Final Fantasy 8--"special" because you'll watch a UFO zip by. Trigger these events in the Heath Peninsula, Kashkabald Desert, Mandy Beach, and Winhill Bluffs, and you'll actually be able to take on the UFO in a fifth encounter. Once it's destroyed, return to the Balamb Garden crater to meet PuPu, the fellow who piloted the UFO. You can give him Elixirs or fight him; the choice is yours. You could eat him too, but that's just...strange.

The Silent Hill series is known for many things besides pants-crapping terror. Every game features multiple endings, and most include a ridiculous one involving aliens and UFOs. Unlocking these endings involves a crazy number of steps, but the reward is so mind-bogglingly silly that it's worth the journey. And no journey is as bizarre as Silent Hill: Shattered Memories.

First, finish the game. Simple enough. Now you have to find the United Fruitcake Outlet (UFO, get it?) billboard and call the number listed. Thirteen UFOs then appear throughout the game. Snap pictures of them all, and you'll unlock this absolutely insane ending. Lead character Cheryl Mason becomes a dog, and her therapist Dr. Kaufmann becomes an alien. And the whole thing is done in a low-framerate anime style. Who said Silent Hill can't surprise us anymore?

Some believe we're not alone in this world, and we're certainly not alone in the video game universe. These aliens are well hidden, but they're not the only secrets out there. What other creatures have you uncovered in your favorite games? What video game aliens do you like? Let us know in the comments below.

Aliens aren't the only easter eggs in video games. Check out the goodies hidden in Portal 2, or see our 100 best Easter Eggs of all time for a comprehensive list.