Jungle hazards: holes, puddles, fog

The Jungle is the zone added by Primal Dread: 20 waves of dinosaurs on a map broken up by holes. Holes block your movement but not flying enemies, and evolved enemies leave puddles: oil from Mecha enemies slows you, acid from Mutant enemies damages you while you stand in it. You choose the Jungle on the zone screen after picking a character, or let the Random option choose.

Hazards

Hazard	Effect	Counter
Holes	Block your movement; you do not fall in. Flying dinosaurs cross them	Keep an exit route; fewer and smaller clusters since 12 November
Oil puddles (Mecha enemies)	Slow you	Plastic Boots remove puddle effects
Acid puddles (Mutant enemies)	Damage while you stand in them; damage rises each wave	Plastic Boots; step out, since damage stops when you leave
Stampedes	Packs of dinosaurs charge across the map as a horde	—
Mecha lasers	Long beams from Mecha enemies	Jamming Backpack slows Mecha enemies you hit
Brachiosaurus Foot	A foot that lands and fires projectiles; since 12 November it has a landing attack, 8 projectiles instead of 14, and can be Mecha, Mutant or neutral	Leave the landing area
Dino Eggs	Enemy eggs that hatch if left alone	Break them early; destroying 25 unlocks the Dino Egg pet

Mud Lover, the Poacher’s unlock, gives +60% Damage while you stand in a puddle. Plastic Boots stop puddles affecting you; neither item text says whether the two work together.

12 November Jungle changes

• More basic enemies in waves 2 to 5 and in low-material waves, for a better early economy.
• Waves 7, 11, 12, 16 and 17 rebalanced. On Nightmare, wave 7 has two Mother Carnivorous Plants instead of three.
• Jeholopterus no longer spawns.
• Acid damage increase per wave lowered from 0.1 to 0.075; acid ticks as soon as you step in and stops when you leave.
• Carnivorous Plant and Mother Carnivorous Plant no longer leave acid.
• Pterosaur charge speed greatly reduced; Velociraptor speed boost and Spinosaurus dash frequency lowered.
• Baby T-Rex health from 10 to 8. Giant Dragonfly, Enigmacursor and Dilophosaurus wait before their first attack.
• Dilophosaurus in wave 3, and in wave 11 on Nightmare, spawn together, which the developers say helps melee builds.

Jungle-only challenges

Three Primal Dread challenges need the Jungle: kill 20 different enemy types there (Poacher), kill 100 raptors (Raptor Eye), and kill 200 enemies there with the Whip (Flail). The full list is in Primal Dread achievements.