Sonic the Hedgehog: Revive

Sonic the Hedgehog: Revive is a revive of Sonic the Hedgehog and Sonic the Hedgehog 2 released for PC.

Playable characters

 * Sonic the Hedgehog
 * Miles "Tails" Prower
 * Knuckles the Echidna
 * Mario (available when Super Mario 3D pack is buyed)
 * Luigi (available when Super Mario 3D pack is buyed)

Other characters

 * Dr. Robotnik
 * Metal Sonic
 * Yellow Toad (found in Mushroom Kingdom zone)
 * Blue Toad (found in Mushroom Kingdom zone)
 * Toadette (found in Mushroom Kingdom zone)
 * Animal Friends:
 * Flickies
 * Rickies
 * Rockies
 * Pockies
 * Pickies
 * Cuckies
 * Peckies

Enemies
See here.

Zones
There are 10 zones in total. At the Boss Battle act, you have to fight Dr. Eggman in his Egg Mobile or Metal Sonic. There are also 2 extra zones available by buying Super Mario 3D pack and 1 extra zone available by buying The New Adventure of Sonic pack.
 * 1) Green Hill
 * 2) Water Palace
 * 3) Secret Tempest
 * 4) Fire Field
 * 5) Hill Top
 * 6) Sky Chase
 * 7) Undead Cavern
 * 8) Scrambled Egg
 * 9) Dark Utopia
 * 10) Doomsday

DLC Zones

 * 1) Mushroom Kingdom
 * 2) Bowser's Empire
 * 3) Phantom Emerald

Original Game Bosses

 * Green Hill: Death Egg Robo
 * Water Palace: Egg Hydrant
 * Secret Tempest: Egg Dynamo
 * Fire Field: Egg Fireball
 * Hill Top: Egg Mobile-D
 * Undead Cavern: Wind-Up Egg
 * Scrambled Egg:
 * Metal Sonic in Egg Fireball (act 1)
 * Metal Sonic racing (act 2)
 * Egg Springer (Boss Battle act)
 * Dark Utopia: Mega Death Egg Robo
 * Doomsday:
 * Death Egg Robo (phase 1)
 * Dr. Eggman in his Electric Eggman Ultrabase (phase 2)
 * Mega Death Egg Robo (phase 2)

DLC Zone Bosses

 * Mushroom Kingdom: Bowser Jr. in his Airship
 * Bowser's Empire:
 * Bowser Jr. in his Koopa Clown Car (act 1 & 2)
 * Bowser (Boss Battle act, phase 1)
 * Bowser's Phantom Red Onyx Robo (Boss Battle act, phase 2)
 * Phantom Emerald: Giga Egg Mecha