UME-Logo The Ultimate Mixed Eras experience.

IMPORTANT: When updating from before 1.6.4:

Go to your game directory at "(...)\Jurassic World Evolution\Win64\ovldata\"
Delete the entire "JPEOCore" folder. This folder uses a more efficient structure now.

All JW and JP buildings available in JP Sandbox.
All special buildings. (operations centre - arrival tunnel - arrival monorail station - monorail gates - tour gates)
No limits on the number of buildings in Sandbox (operation buildings/visitor centres/helipads/etc).
Makes Scientist guests spawnable in JP Era. Spawned using sciencey buildings.
BOTH Aviaries work in JP Era
All Ranger and ACU skins accessible in JP Era

Guest crossings for gyrosphere, truck and jeep tracks.
Monorail Lookout Stops.
Jurassic Park gates for guest paths (if you have Expanded Paths, Pylons and Fences installed).
Enhanced Terrain Tools PLUS (+)
NO track, path or fence constraints
NO scenery constraints
NO terrain constraints
NO building clipping (Sandbox-only)
Increased slope when placing buildings
Underwater/Underground feeders
Remote Hatcheries at Arrival Helipads
- Ingen Database and Expedition Map for Sandbox and Challenge Modes

Hatchery Capacity 2.0: +3 slots (so you can use it alongside Speed/Success Rate)
Success Rate X: +1,000% viability
Incubation Speed X: Near-instant incubation.

Found inside the ReadMe file included with the download.