Sonic the Hedgehog (8-bit)
Quickly cross the bridges before they crumble, or else you'll end up in the bottom the the lake! Jump from seesaws to reach high cliffs. Good timing is the key to success.
— Description from the Instruction manual.
Bridge Zone (ブリッジ Burijji?, lit. "Bridge") is the second Zone in the 8-bit version of Sonic the Hedgehog for the Master System and Game Gear. Located on South Island, Bridge Zone is two full-length acts long with a third act containing a boss fight against Dr. Eggman. Bridge Zone is set across a huge river with many separated bridges.
On the South Island map, Bridge Zone is located upstream of the island's massive central river and close to wide waterfall. The Zone has light blue sky with large clouds. Also, forests and mountains can be seen in the background. Bridge Zone, as expected, is filled with wooden bridges connected to grassy islands with a few light-green rocks on them. Some of the bridges placed in the waterfall sections are less sturdy than the regular, sloping ones. Unlike Green Hill Zone, the landmass of the islands are covered in diagonal checkerboard patterns.
The upstream river itself below the ground and bridges is a dangerous abyss, which the player can fall straight into, and many Badniks and their projectiles can easily knock the player back into the river. Bridge Zone feature seesaws on pole structures as general gimmicks.
Act 1 features a linear route to the Bonus Panel. Occasionally, there laterally-placed yellow Springs, which can easily bounce the player backwards. and generally into the river abyss. Platforms from Green Hill Zone are also found here, which swing on different patterns.
Act 2 is an unusual autoscrolling level, as the game controls the rate at which the player move through the Act. The layout of this Act is similar to Act 1, except the player is emerging from the upstream river. The player has to keep eye on the right side of the screen and prepare to face Badniks or seesaws. Act 2 is impossible to finish in less than two minutes due the autoscrolling mechanic.
Like in many other third Acts in the game, there are not any Rings when the player faces Dr. Eggman in his submarine mobile, which has two small turrets on the top. In the Master System version, Eggman will pop out of the river between the islands to fire projectiles, and then hide in the river again. The player has to either duck and wait for a good moment to Spin Jump on the submarine mobile to damage it before it fires projectiles. The player has to be careful of not falling into river. The player has to land eight hits to defeat the boss and complete the Zone.
The level layout of Bridge Zone Act 3 is very different in the Game Gear version of the game. Aside of crossing long crumbling bridge, the boss arena includes two sloping bridges due the screen resolution of the Game Gear. As Eggman appears in his submarine mobile, the player can easily do the Spin Jump without worrying of falling off. In fact, there is an effective strategy: simply roll into Eggman to deal about three hits of damage at once.
Chaos Emerald location
- A Chaos Emerald can be found at the end point of Bridge Zone Act 1. before crossing the last crumbling bridge. The Chaos Emerald itself is found below the island. The player can get it by using the small crumbling bridge parts and then use a well-timed Spin Jump to the left to catch the Chaos Emerald and jump back to the upper part of the island.
- The background music for Bridge Zone was, years later, remixed as Tails' theme music in Sonic Adventure, "Believe in Myself".
- After passing the only Arrow Monitor in Bridge Zone Act 2, the first pit will contain an extra life Monitor buoyanting below on the river. The player can break the Monitor to get an extra life, while bouncing back from the pit.
- Another extra life Monitor can be found behind the player right after the start in the Bridge Zone Act 3.