Sonic The Hedgehog

Sonic The Hedgehog is a 2D platformer released by Sega on June 23rd 1991 for the Sega Genesis.

The sequel, Sonic 2, released a year later

Story
One Day a evil scientist name, Dr. Robonik captured all the flickies and animals in capsules across 7 worlds

it's up to Sonic to rescue the flickies and defeat the foe, whilst also getting chaos emeralds.

Gameplay
It is your standered 2D Platformer, but with speed, after Sonic runs to the right, he builds up momentum and

goes in blistering speed, he can collect rings which act like his health points, once he collides in with a enemy or spike, rings fly out and he must collect them back again.

He can run into loops where he can collect rings on them, but also s-tube tunnels, springs to send him into high heights.

after collecting 50 rings he can enter a bigger ring in which he can collect a chaos emerald, but he has to do a obstacle where he needs to break coloured bricks to continue, theirs bumpers, end balls and more.

Zones
There are 7 Zones in the game, in where theirs 3 acts in each zone.

And every 3rd act of each zone, a boss fight with the mad lad appears. Green Hill Zone - A Fast pace land where you can easily build up speed.

Marble Zone - A Labyrinth full of lava, spikes and movable blocks.

Spring Yard Zone - A zone where you bounce around a lot, and waiting on moving blocks...

Labyrinth Zone - A big labyrinth where water can hinder the players progression.

Star Light Zone - A dark city zone where you run up and down, jump on seesaws with a object that can pull you up on them.

Scrap Brain Zone - A filthy wasteland where technology roams, dissapearing platforms, fast rotating blocks etc..

Final Zone - A boss against Dr. robotnik.

Power-ups
Their are monitors that grant sonic ability's he couldn't do before hand.

Ring Monitor - After Breaking you collect 10 Rings.

Shield Monitor - Allows sonic to have 1 more hit.

Invincible Monitor - Allows Sonic to run into enimys, run on spikes and much more, except water.

Speed Shoes Monitor - Allows Sonic to run even faster.

1-UP Monitor - Grants Sonic another life. (He can collect 100 Rings for a 1-UP to)

Trivia

 * The Sonic sprite was later used in Sonic 2 and CD.
 * It's the Sonic game that has the most ports.
 * The Japan release fixed several bugs and glitches.
 * The game was to compete with the Mario brand.

Fundamental Flaws

 * The North American version has a glitch where hitting a spike kills you instantly after the second hit.
 * In moments where your going fast (ex s-tubes) going to fast can result the player a death, due to the camera not catching up with the player, this bug was fixed in future versions of the game.
 * The player can stand on the edge of a moving platform and stand on the surface on the cornor, once done the player will go in a speed the game dosen't allow you to go, this is best used in Marble Zone.
 * There is no "press start" button on the title screen because it's a bug.

Walkthrough
https://www.youtube.com/watch?v=kSmcxV35Xrg