As with a number of other people, I decided to try this challenge for myself. However, having spent years playing roms and getting all sorts of games for my comic, I had a bit of a tough time finding games I hadn't played already. I did manage to find one for the whole alphabet, though most of them are ridiculously obscure (and, as such, excessively terrible). I did manage to find a few gems among them, though. However... I was a bit more verbose than Satsui in my reaction to each game, so you've been warned.

Here's my list:

Adventures of Rad Gravity:
This seems pretty good, despite my initial reaction to the graphics and poor hit detection. The graphics seem to be mimicking a PC game, very large sprites and cutscenes with very cartoonish people. The gameplay is basic platforming, jumping and slashing with a laser sword. You have a communicator that can pull you out of the level at any time to get back to full health, but if you do, you have to start the level over again. I died numerous times and never seemed to face any consequences for it, so I'm not sure what difference it makes. There was a score bar, but it didn't go up when I killed enemies, only when I picked up items... and damn, was it random... The first item I picked up was an item that gave me an extra health bar, and it gave me... 71,598 points. Randomness, anyone? Sound and music was pretty average, it wasn't great, but it wasn't annoying, either. I had some problems early on with the hit detection, but was able to get the timing of hitting enemies before they hit me down pretty well. Just before the end, I picked up a gun, so that helped a lot. I got through the first area and got the "teleport location" for the second, the game seems somewhat open ended as to where you can go... I'm honestly interested in seeing more of this game. 8/10

Breakthru:
A sort of scrolling shooter, with a ...tanklike jeep... that can jump. I wasn't able to get past the first stage, despite continuing multiple times. The momentum system the game has for speeding up and jumping over obstacles is terrible, and the falling rocks don't fall in a predictable pattern... they just fall directly in front of you, making it impossible to move forward at any decent speed. Oh, and there's also guys with guns, big trucks with guns, land mines, and missiles being shot at you. Absolutely terrible, I say. 2/10

Captain Planet and the Planeteers:
I'm confused, and relieved... I started it up fully expecting to hear an 8-bit version of the show's end theme, but instead got some very generic music. The same was true for the intro cutscene where Gaia said that Hoggish Greedly was going to drill for oil in national parks, and also in the game itself, very generic music all around. The game is a very poor side scrolling shooter, you control the Planeteer's ship. You have all five of the Planeteer's powers at your command: Fire shoots a fireball straight ahead, Water sends a water whirl in a wave-beam like pattern, Wind creates a shield of tornados around the ship, Earth sends a rock out in an arc about an inch in front of the ship, and Heart is a... I guess it's a tractor beam for rescuing the little animals, I think that's the point of the game... Not entirely sure. I think I made it to the end of the first stage, since I ran into a dead end that had an animal in it, but I couldn't pick it up... I was all out of power. Each power you use lowers a power meter, Wind lowers it faster than any of the others, and by the time I got to the animal, I was entirely out, and couldn't do anything but crash into the wall and die. 2/10

Dash Galaxy in the Alien Asylum:
This is a game that absolutely needs a manual, I have no clue what I just did. It starts off with a box puzzle, you move boxes to get to doors that lead to platforming sections where all you can do is jump and move... very, very slowly. Hitting B just tells me that I don't have any bombs. I mostly figured out what each little item did, but I still have no clue what the bomb did that I finally picked up and set. Beyond that, though, the music is absolutely horrible and the graphics are very primitive, looks like it'd be more at home on one of the mid-level Ataris. Not unplayable, but still pretty damn bad. 4/10

Eliminator Boat Duel:
This was... surprisingly fun. Sort of like an early Rock N' Roll Racing, minus the Rock N' Roll, with boats instead of cars and trucks. Basic racing concept, but you get money whether you win or lose, and you can retry a race up to three times. You spend money on upgrades for the engine, turbo booster, steering, and hull, the interesting thing is that the computer opponent is also spending money on the same thing, so they get better along with you. Pretty good stuff, kept me entertained past the 10 minutes... until I got a game over and had to start over with the first race. 7/10.

Flight of the Intruder:
Excuse me, one second, must go look up when this was released, and when Top Gun was released... Yeesh, both Top Gun and Top Gun: The Second Mission were released before this pile of ass. It's a pathetic version of Top Gun, same view, very similar console, controls like a rock in the air, and you only get three missiles, which are impossible to aim properly. I'm not sure if you're supposed to get from point A to point B, or somehow destroy all the enemies, I got a game over and stopped caring long before I beat the first level. 1/10

Gilligan's Island:
There we go, an 8-bit version of a tv show theme. Unlike the zany antics of the show, though, the game was rather slow and dull. You control the Skipper, and Gilligan just kind of tags along doing nothing. You can jump and punch, and while there are numerous animals trying to kill you, the punch doesn't seem to affect any of them. Thankfully, the game gives you a map, but getting around is achingly slow. I found the Howells, and they told me that a bird stole their ring and took it to the tree, but the tree wasn't labeled on the map. So, I wandered around for a bit, fell into a "sand waterfall" and ended up a long way back, and gave up on it. Not horrible, but not too great, either. 5/10

Hudson Hawk:
...This was a movie tie-in game? News to me... Somewhat average platformer, with terrible jumping controls and awkward box puzzles. If you push a box into a wall... it reappears to the left of you. And the first place you have a box puzzle where this can happen, there happens to be a laser that shoots at that spot of the floor in timed intervals, so there's a good chance you'll walk straight into it because the box just suddenly disappears. In the third room, there were some kind of lasers on the floor that I couldn't get past, the jumping was just too crappy to time it properly. I didn't play much, but I didn't like what I did play. 3/10

The Immortal:
Instant death, every step of the way. In the room you start in alone, there's two ways to die. Beyond that, there's flames shooting from the floor and walls, arrow shooters, and many other implements of death. The layout is similar to Exodus or some other skewed, pseudo-3d game.The combat system is awkward, your dodge barely seems to work, while the enemy's dodge always succeeds. I didn't make it very far, even just running like hell and avoiding the enemies as best I could, the simplest enemies killed me easily. 3/10

Jurassic Park:
Why do the dinosaurs quack when I shoot them? Why do they explode in a puff of smoke when they die? Why do they drop ammunition for my bazooka? Why does it take two bazooka shots to kill the tiniest of dinosaurs? Why, when I was told to rescue Tim from a Triceratops stampede, am I wandering around collecting dinosaur eggs? What the hell am I supposed to do after I collect all 12 eggs in this area? But overall, not bad for a movie tie-in game. 6/10

Klash Ball:
Well, I tried to avoid getting any sports games, but I didn't have many choices in the K's. At least this is a sports game unlike many others, none that I can think of anyway. ...And I got my ass handed to me, lost 5-2. I read the instructions that it had on the title screen, but never seemed to be able to steal the ball... or even really have any clue of what I was doing. I was told to get 2 crowns, but I didn't even see one. Not bad, just not for me. 5/10

Laser Invasion:
Well, I was told that this game was a Zapper game, or, more accurately, a Laser Scope game, but I spent the first half of the 10 minutes just trying to get it to work with either, and failed completely. Not to mention, you have to use the controller to move left and right and whatnot... How could you do that with the Zapper or Laser Scope? Basically, another Top Gun clone, but you're in a helicopter this time. Oh, and one single missile kills you, no matter how much health you have left. Oh oh, and the music and sound effects both sounded like they were taken out of TMNT II and tweaked ever so slightly. 3/10

Mechanized Attack:
Huh, another Zapper game, and this one actually works with the Zapper. ...Sort of. Using both FCE Ultra and Virtua NES, I was unable to get the Zapper to actually work with it. Virtua NES worked slightly better, but the aim was way off, somehow. In testing it, I went and opened up Duck Hunt, and the aim was spot on, so I dunno what was up with it. Not bad for an NES rail shooter, but I'd be having a lot more fun if I was able to use my Zapper (read: mouse). 6/10

Ninja Kid:
An extremely Japanese (I was being attacked by rolling Daruma, for crap's sake) platformer with one hit kills. Unless you're playing a game named "Contra" or "SuperC", you shouldn't be playing a platformer with one hit kills. Cute sprites, though. 3/10

Overlord:
Well. This is definitely a game that needs an instruction manual. Probably a 50 page thick one. I was able to find my way around a little bit, and it seems like a very deep game, what with buying ships, mining and farming facilities, defenses, choosing the amount of people, food, fuel, and energy to put on each craft you send out... However, I never figured out how to actually send the crafts out. They made it into orbit, but I couldn't figure out how to send them to the next planet, which I'm assuming is how you progress in the game, controlling more planets and eventually wiping out the enemy. Fun, but it'd be more fun if I had a better idea of what I was doing. 6/10

Photon: The Ultimate Game on Planet Earth:
The name is definitely false advertising, I wouldn't even call it the Ultimate Game on Planet Venus, it's that bad. I initially thought of the stages where you moved forward in Contra, rather than to the right, but this game is set in a maze, so you can move in all directions. ...While still only moving forward, the game automatically turns when you walk off the right or left edge of the screen. It's definitely a game that's in need of a map system, you could map it yourself, but it'd be hard given the nature of moving in the game. Pretty bad overall, I was bored and lost within minutes. 3/10

Quattro Adventure:
Hm, four games in one, I didn't know that... I decided to cover all four games in 10 minutes, rather than spending 40 minutes covering this unlicensed nonsense...
Linus Spacehead:
For a game called Linus Spacehead, why does it start you underwater, unable to do anything but jump on bubbles that pop nearly instantly? Trying to work your way upwards isn't fun, it's a horrible chore. Fail #1 for this game. 1/10
Super Robin Hood:
Ehh... Honestly, not bad. A platformer with unresponsive controls, but meh, I've played worse. As Robin Hood (who has a ridiculous look on his overly large head), you run around shooting people with arrows, dodging traps, and stealing treasure. Not a fail. 6/10
Boomerang Kid:
With a name like that, I expected it to be a platformer where you played as a kid who attacked with boomerangs. Instead, I got a platformer where you play as a kid and you have to platform through each level trying to collect all the boomerangs on the screen, and leaving through the door once you have them. Snakes or giant worms, I can't tell which due to how the sprites look, slither back and forth all over the place, and you can die if you fall too far. Fail #2. 2/10
Treasure Island Dizzy:
Admittedly, the Dizzy series is the best thing the Code Masters company ever produced, with Dizzy the Adventurer being the best one in the series. That said, the games are still subpar compared to some of the classics, and Treasure Island Dizzy is far worse than Dizzy the Adventurer, in graphics, sound, and gameplay. 4/10
Averaging the scores together gives us a 3.25/10, which sounds about right to me.

Rocket Ranger:
What on earth am I playing? There's tons of text explaining how aliens attacked, and every time you move to a new country, you get a wall of text that sounds more like a d20 Modern scenario, right down to the "You are" nonsense. I'm not sure if the manual would explain where you're supposed to go, or if it'd all be trial and error. I was expecting a platformer with a jetpack, but instead I got... a boxing match, with really bad controls, and sound effects that didn't make sense. You got one sound effect when you landed a hit, a different sound effect when you got hit yourself... and that same sound effect when you threw a punch that missed. After winning the boxing match, I apparently got one rocket part, but didn't have enough fuel to return to America and check out the rocket lab... so I just checked out various South American countries, being told via Text Wall that most of my trips were pointless, and in one country, I got a section where I was shooting upwards at an Aztec temple, covered in gun turrets. It was... just plain weird. 4/10

Silkworm:
Wow, talk about your mediocre scrolling shooters. The choice to play as either a helicopter or a jeep is at least mildly nifty, but it's not enough to save this game from being utterly boring. There aren't even any powerups! What kind of scrolling shooter doesn't have powerups?! 3/10

Time Lord:
This is somewhat Double Dragon-esque. It definitely is a side scrolling beat em up game, but all the enemies fall in one hit, and the hit detection is beyond terrible. Enemies seem to damage you before they even touch you, and you can hit enemies behind you by swinging forward. You also can't run in this game, even though some of the jumps seem like they require that ability. You're looking for 5 Time Orbs in each stage, but I only found 3 in the first stage, there must've been an area I didn't find. Not too bad, but it didn't really grab me, and the slow pace just made things dull. 5/10

Ultima:
Exodus: I know 10 minutes isn't much for an RPG, but my options were very limited for the U's. Moving around the map is Dragon Warrior-esque, to continue with the comparisons, but the combat is more like an early strategy game. In the 10 minutes, I completed... one battle. I didn't want to just talk to everyone for the entire time, so I just wandered around the overworld map lost. Seems like a decent, if somewhat slow, RPG. 7/10

Videomation:
Take Mario Paint. Take away all references to Nintendo games. Take away all the color palettes, and add in ones which look like they were rejected from an 80's neon color dump. Take away all the catchy music, and replace it with horrendously bad sound. Now take away the ability to animate your own art, and place in absolutely terrible clip art with a few predetermined animation paths. And, while you're at it, take out the stamp creator, the music creator, Gnat Attack, the coloring book, the ability to save and load your drawings, the cool ways to erase the whole drawing, and the damned undo button, and there you have Videomation. 1/10

World Games:
A manual would've been handy here, you'd think it'd just be another button mashing sports game, but a lot of them are just plain confusing. Just to list em, there was Weight Lifting, Barrel Jumping, Cliff Diving, Slalom Skiing, Log Rolling, Bull Riding, Caber Tossing, and Sumo Wrestling. There's too many games to talk about each one individually, we'll just leave it at this... I failed at just about all of them. Any games I won were by random luck and button mashing. Although, it is worth mentioning that in the Caber Toss, I managed to throw it nearly straight up, and it fell back and landed on top of me... and the animation showed it pounding me into the ground like an old Tom and Jerry cartoon or something. 4/10

X-Men:
I did NOT need the full 10 minutes for this one, what a craptastic game. Looking at the characters you can play as, I thought it'd at least be close to the arcade game... but no, it's just plain bad. The graphics are horrendous, the controls are shit, the hit detection is ridiculously off, the music is grating, why was this game even made? It barely deserves it, but... 1/10

Young Indiana Jones Chronicles:
Like so many other games based on shows on the NES, this is a very nice platformer. The array of weapons is nice, the hit detection is spot on, the music is good, and the difficulty is just above midrange. There's really not much else to say about this one, it's rather fun all around. 7/10

Zombie Hunter:
...I think this is some sort of action RPG... but I just plain don't like it. Graphics are crap, music is too, gameplay is just poor. 2/10