A jungle-themed stage.
|Number of acts||
Lost Jungle is the tenth stage in Sonic Heroes. Being a watery swamp, this is the most jungle like level in the game. In contrast to the green frogs seen in Frog Forest, black frogs in this level call rain that destroys nearby plant life. A giant alligator lives in the lowest point of the swamp.
Descending from Frog Forest's canopy, Team Sonic ventures through the depths of the jungle to stop the Egg Fleet to save the world. Team Dark explores the depths of the jungle to pursue Eggman to make him answer for the Shadow Android. In the final steps of the level, Team Sonic and Team Dark must escape a giant alligator that chomps its way to the team. The player must swing on the ivy swings until they land on a ledge. Team Rose must escape the jungle to stop the Egg Fleet and impress Sonic. Team Chaotix are tasked to rescue 10 Chao.
Rank Requirements (Normal Missions)
|Rank A||Rank B||Rank C||Rank D||Rank E||Mission 1|
|Team Sonic||32,000||28,000||24,000||20,000||<20,000||Venture through the deepest part of the jungle!|
|Team Dark||40,000||35,000||30,000||25,000||<25,000||Explore the deepest part of the jungle!|
|Team Rose||42,000||38,000||32,000||28,000||<28,000||Escape the jungle!|
|Team Chaotix||40,000||36,000||32,000||28,000||<28,000||Rescue 10 Chao!|
Rank Requirements (Extra Missions)
|Rank A||Rank B||Rank C||Rank D||Rank E||Mission 2|
|Team Sonic||30,000||28,000||26,000||24,000||<24,000||Get to the goal Ring within 6 minutes!|
|Team Dark||14:00||14:30||15:00||16:00||>16:00||Defeat 100 enemies! (Time in minutes.)|
|Team Rose||3:45||4:30||5:00||7:00||>7:00||Collect 200 Rings! (Time in minutes.)|
|Team Chaotix||32,000||28,000||24,000||18,000||<18,000||Rescue 20 Chao!|
- At some low altitude checkpoints, especially those surrounded by water towards the beginning of the stage, an alligator can be seen in the distance, although only its head is above water.
- A stage in Sonic Lost World, called Silent Forest, has many similarities to Frog Forest, Lost Jungle, and Tropical Jungle, the latter being from Sonic the Hedgehog (2006).