Zineth

Zineth is a student-made free-to-play open-world free-running indie game.  You soar through the sky and desert on these mechanical limbs and you can coast the dunes and local structures.  There isn't really much to this game.  Just soaring through the desert, climbing the skyscraper in the middle, doing random missions, checking your phone (there is an in-game phone that has messages, a game, a link to the twitter page, and a few other apps), and flying to the moon.  The three main aspects of this game are speed, movement, and twitter.  The game's "story" is really short.  Your boss texts you to pick up some papers and distribute them to a few people, then he tells you to go to the moon.  Yep.  That's it.  The whole story.  Once you go to the moon you've beaten the game and you unlock an ability that allows you to speed up on command.  Normally a typical speed in the game would be like 200-500 units (in-game units aren't specified as to what unit it actually is), however with the speed up ability unlocked you can got to 5000+.  You could cross the entire game's map in a couple seconds, whereas normally it would take you a little bit.  Mainly the point is to explore and slide around walls.  The game may be short but it is relatively fun when you get the controls down.  If you would like to download it just Google "download Zineth" and it will be one of your first results.

LSD: Dream Emulator

Wiki  <--
LSD: Dream Emulator is a game about some dude's dreams.  It is a surreal exploration game.  Hiroko Nishikawa kept a dream journal for 10 years (this is real life by the way, not in game).  He kept documents detailing his dreams for 10 years, and decided to put them into a game.  He was an employee at Asmik Ace Entertainment, so he created the game through them.  This game was released for the original PlayStation in Japan on October 22, 1998.  The point of the game is to explore.  You travel through different, weird environments, and you just have to discover.  When you bump into an object in the game, you get transported to a new, weirder place.  Sometimes you can get transported to the same area again, however, you will notice the textures will have changed (as seen above (that is the same room)), and there won't always be the same objects.  The entire environment will change based on what you do, and the game will log what you have done and tell you what dreams you have linked, how many days you have been asleep, and some other relevant information.

To get the full experience of this game, it is best played in the dark and while alone.  For the average human, this could be quite thrilling, as most of the environments are mysterious and freaky.  Even watching someone else play it on YouTube in the dark can be a bit heart-racing.

Risk of Rain

Here is the official website.

Risk of Rain is a game set in the distant future.  In this reality, space travel is an everyday thing, and people and cargo can get transported through space on "space trains."  One special space train is carrying important cargo.  For an unknown reason, it crashed and lands on a mysterious planet.  There is only one survivor.  You.  The game plays with perma-death as its main feature.  This means that once you die, you die.  All progress you had achieved up to the point of death is lost, and you have to start again (unless of course you rage quit).  

There are ten classes (as shown above).  They are from left to right, top to bottom:  Commando, Enforcer, Bandit, Huntress, HAN-D, Engineer, Miner, Sniper, Acrid, and Mercenary.  There is around 20 different enemy types, and 10 bosses.  The levels are randomly generated, so it is a unique experience every time you play.  There are plenty of items in the game (over 100) that power you up and help you explore the planet and find the teleporter to home.

The game also has a co-op multiplayer feature, so you can kick alien butt with a friend, and the difficulty for this game is quite high, so I wish you good luck if you choose to play it.  You will more than likely rage quit.  I have many times.

Revenge of the Sunfish

Oh boy...
How do I even begin with this game?

Ok so there's this game called Revenge of the Sunfish.  To give you an idea of gameplay it is basically Microsoft Paint crossed with Adobe Flash.  Click this link to go to it's website's download section.  I warn you....it's painful.  There's pretty much no coherence to any of the levels, and the levels last about 10 seconds each.

Here we see the Sunfish headed for Earth....

...and here we see the Sunfish conquering the Earth...

...and here is an actual level in the game...

...you have to have an intimate time with your keyboard...

...I tell you this game is a piece of work

In this game you take control of a plethora of characters.  They range from spaghetti looking blobs of crap to a very poorly drawn stick figure.  The levels are quite colorful and it's hard to discern the floor from the backdrop.  Some of the...no...most of the levels have nothing to do with taking the Earth back, as you can see with the keyboard getting pleasured, with a Pleasure Meter to top it off.  Sometimes you can shoot, and others you just have to die to go to the next level.  This "game" is quite the trip.  You can coast through most of the game by just dying because it takes you to the next level anyway.  For whatever reason, the author, Jacob W. Buczynski, considers this a "feature."  These game mechanics just keep catching me off guard.

Ao Oni

Ao Oni ("Blue Demon") is a Japanese survival  horror game made with RPGMaker.  The plot is about a group of friends enter a "haunted" mansion just because.  After a short while some of the kids start to disappear.  Hiroshi, the main character, eventually finds out that they are turning into Oni (Demons).

Hiroshi

The Oni

You find yourself locked in the mansion with the creatures, and you have to find your way out by solving different puzzles.  Your friends turn into Onis as well, which kinda sucks.  Iz scerry.  Rlly scerry.  The main aspect of the game besides the puzzle solving is the chase sequences.  At random times one of the Oni will chase you and if they touch you, you die.  You have to escape them by outmaneuvering them.  This game was mostly made famous by a YouTuber that you most likely have heard of.  He is the most subscribed person on YouTube.  His stage name is PewDiePie, while his real name is Felix Kjellberg.  He mostly does run-throughs of horror games (or he used to, anyway) and he had a playlist of this game.

Here is a link to that playlist.

Eventually (by the end of the game) Hiroshi gets out (not exactly a surprise) and is the sole survivor of the group of friends.  Overall this game is fun the first time around, but there isn't much replay value, so don't plan on keeping it in your library for long.

Also check out a game called Yume Nikki

Touhou

Touhou is a danmaku style game.  Danmaku is Japanese for "bullet curtain."  As you can see on the picture below, this game is a lot of dodging.  Each of those circles is a "bullet," and you can only take one hit before you die.

There are 14 Touhou games, some of which have spin-offs.  The main page of the Touhou wiki has a list of each individual game.

The story of the game is a little hazy, and since the game is in Japanese (unless you have a patch) it is hard to decipher it, but this is what I have gathered.  An event happens where this illusion village known as Gensokyo crosses with a real-life Japanese village and a bunch of shrine maidens fight vampires and crap from the mysterious realm.  I may have got that semi-right, or I may be totally off.  Feel free to do your own research and tell me how wrong I am, but I don't play the game for the story.  It is addicting to try to dodge all the projectiles and not break your keyboard when you die (which you most assuredly will).  Powerups in this game increase your bullet spread, strength, and spead.

Touhou is known for having really great songs that you are won't forget.  Touhou 7: Perfect Cherry Blossom, in my opinion, is the best of all the Touhou games, and has the best soundtrack.

You may have heard of a song called "Bad Apple."  It is a widely popular song that originates from Touhou 4: Lotus Land Story.  Other memorable songs from the series,include "UN Owen was her?" and Night of Knights.

If you decide to download this game, I highly recommend starting at Touhou 7.  Just do it.

Binding of Isaac

UPDATE:  I changed my topic to under appreciated video games

The Binding of Isaac is a game for Microsoft Windows, Mac OS, and Linux.  It is a top-down shooter rougelike game.  Basically the story is you're just a kid named Isaac, and you live a happy life with your mother, who watches religious television shows all day.  One day God speaks to her and tells her that you, Isaac, are filled with sin and must be killed.  You see your mother walk towards the door, knife in hand, ready to do the bidding of her Lord.  Isaac sees this and runs into a trapdoor that is in his room, leading to the basement.  This is where the game begins.  You have to explore the depths of your basement, fighting various monsters, while trying to escape your mother.  Throughout the game you find powerups that enhance your life capacity, your tear style (what you shoot), how fast you shoot tears, your strength, luck, speed, etc.  This game is also perma-death, meaning that once you die you're done.  To play again you have to start all over.  The game has an amazing soundtrack as well.  As you play you also have the ability to unlock other characters, which change your starting abilities.  Isaac, Eve, Cain, Judas, Samson, Blue Baby, and Maggy are all playable characters.  If you haven't noticed already (though I don't see how you couldn't) this game is very religiously influenced.  There is roughly 50 bosses in the game.  This link will take you to a list of the bosses.  This link takes you to the wiki about the game.

Here is an example of some boss monsters:

Monstro

Loki

The Fallen

It Lives

Satan

Monstro II