Sonic Adventure 3 (Red-Verse-Writer Idea)

"Full speed ahead."

- Release tagline Sonic Adventure 3 is a Sonic the Hedgehog 3D action platformer game concept by Red-Verse-Writer, a third instalment in the Sonic Adventure mini-series. Set after the events of Sonic Forces, as Sonic and his friends continue their rebuilding of the world, Eggman, still reeling from his previous defeat, steals the Chaos Emeralds and begins experimenting with them in an effort to finally defeat Sonic permanently, only to begin tearing apart the fabric of reality as he loses his mind to the immense amounts of Chaos Energy emitted by the Chaos Emeralds. The game then follows various characters from the series as they attempt to collect other sources of power to find a way to defeat Eggman while also tackling their own personal objectives.

Gameplay
Sonic Adventure 3 is a 3D action-platformer game with adventure and role-playing elements which plays with many similarities to the classic Sonic Adventure games. The game replaces the team-based campaign of Sonic Adventure 2 with individual character campaigns similar to the original Sonic Adventure, although unlike the original each character has a unique playstyle and their stories do not contradict information from the other stories. Outside of the main game, players can also play minigames, visit the Chao Gardens, and once unlocked play through altered versions of the classic Sonic the Hedgehog games. Each character begins by exploring one of several non-linear hub areas from which they can access main levels to complete objectives and collect items.

Unlike in most Sonic the Hedgehog games, the system of being able to survive any attack so long as the player has at least one ring has been replaced with a more conventional health system, which is represented by a percentage rather than a bar like in other games. Rings still appear as a method of replenishing this health system, restoring 1% of the health percentage per ring collected. The player can also collect different shields that each possess unique properties while also shielding the user from a certain number of attacks. Shields can stack atop one another for additional protection.

Gameplay Styles
Sonic Adventure 3 is notable for featuring 16 different playable characters, more than twice that of Sonic Adventure 2, though initially only six of these characters are playable until the others are unlocked by reaching specific points in their storylines. The playable characters in the game are Sonic the Hedgehog, the series' main protagonist who seeks the Time Stones on Little Planet to take revenge upon Eggman for his previous imprisonment and torture during the events of Forces; Miles "Tails" Prower, Sonic's best friend who begins searching for other sources of power to defeat Eggman; Knuckles the Echidna, the guardian of the Master Emerald who is once again forced to locate the shattered pieces of the Master Emerald; Shadow the Hedgehog, Sonic's main rival; Rouge the Bat, a G.U.N spy and treasure hunter; E-123 Omega, a sentient former creation of Eggman who travels into outer space to find an alternate source of power; Amy Rose, Sonic's self-proclaimed girlfriend who begins chasing after a mysterious energy creature when it steals her Tarot Cards that she uses to predict the future; Cream the Rabbit and her pet Chao Cheese, who begin to search for the godlike being Chaos for assistance in recovering the Chaos Emeralds; Big the Cat and his pet frog Froggy, who enter the Maginaryworld seen in Sonic Shuffle to find the Forcejewels and recruit assistance from the guardian Illumina; the Chaotix, a detective agency consisting of Vector the Crocodile, Espio the Chameleon and Charmy Bee who are hired to find the Arks of the Cosmos by a mysterious informat; Silver the Hedgehog, a time-travelling hedgehog; Blaze the Cat, a princess from the alternate Sol Dimension who begins to gather the missing Sol Emeralds in an attempt to combat the Chaos Emeralds; Mighty the Armodillo,; Ray the Flying Squirrel, Mighty's best friend; Dr. Eggman, the game's main antagonist who begins to wrestle with his own sanity as the Chaos Emeralds begin to overwhelm him; and Eclipse the Darkling, a character from the comic series adapted into the main games and a surviving mutant Black Arms who seeks revenge upon Shadow for killing Black Doom.

Starting

 * Spin Dash:
 * Boost:
 * Homing Attack:
 * Somersault:
 * Grind:
 * Quick-Step:

Unlockable

 * Light Speed Dash:
 * Super Peel-Out:
 * Air Boost:
 * Light Speed Attack:
 * Bounce Jump:
 * Flying Kick:
 * Drop Dash:

Starting

 * Propeller Flight:
 * Tail Swipe:
 * Boomering:

Unlockable

 * Magnet Hands:

Starting

 * Punch Combos:
 * Glide:
 * Climb:

Unlockable

 * Digging:

Starting

 * Weaponry:
 * Rolling Attack:

Starting

 * Triple Jump:
 * Cartwheel:

Starting

 * Axel Spin:
 * Power Boost Jump:
 * Flying Dash:

Starting

 * Wall Jump:

Unlockable

 * Force Jump:

Common

 * Ring: The most common item in the game, found in every scenario. Every Ring collected restores the health percentage by 1%, and if the player is already at 100% health, the Ring will instead be added to the final Ring count at the end of the stage. Collected Rings can be spent in hub areas to buy items, such as upgrades, cosmetic items, additional items for the minigames, and edible items that provide experience points and provoke humorous reactions from the character. The final Rank at the end of a stage also awards the player with additional Rings - 5 for a F Rank, 15 for a E Rank, 25 for a D Rank, 50 for a C Rank, 75 for a B Rank, 100 for a A Rank, 150 for a S Rank and 250 for a X Rank.
 * Big Ring:

Weapons
Weapons appear exclusively in Shadow the Hedgehog's scenario.

Projectile Weapons

 * Automatic Rifle:
 * Egg Gun:
 * Gatling Gun:
 * Heavy Machine Gun:
 * Pistol:
 * Shotgun:
 * Sniper Rifle:
 * Submachine Gun:

Laser Weapons

 * Laser Cannon:
 * Laser Rifle:
 * Refractor:
 * Shard Gun:

Alien Weapons

 * Black Barrel:
 * Flash Shot:
 * Heavy Shot:
 * Light Shot:
 * Ring Shot:
 * Satellite Gun:
 * Shadow Sword:
 * Splitter:
 * Vacuum Pod:
 * Wide Shot:
 * Worm Shooter:

Explosive Weapons

 * Bazooka:
 * Egg Bazooka:
 * Grenade Launcher:
 * MIRV Launcher:
 * RPG:
 * Tank Cannon:

Melee Weapons

 * Crowbar:
 * Egg Spear:
 * Fire Axe:
 * Metal Bat:
 * Shovel:
 * Survival Knife:

Specialised Weapons

 * Medical Kit: A kit containing 50 Rings used primarily to restore Shadow's health or
 * Omochao Gun:
 * Shadow Rifle: