Understand the lifecycle milestones
EFG's current dataset uses Hatchling at 0%, a Juvenile spawn at 25%, Sub-adult at 50% and Adult at 75%. The Prime power window runs from adulthood toward roughly 87.5%, after which stats change with age and species.
A 0–100% duration includes Elder ageing. It is not the time from a normal spawn to Adult. Stages have different lengths, so multiplying a lifecycle total by the percentage of growth remaining is misleading.
Requirements to prepare before 75%
The reference target is five requirements before adulthood. Community references include nesting in, visiting a Sanctuary as a Juvenile, Perfect Diet, zone visits and raising offspring. Some species have passive eligibility; check the species and in-game state instead of assuming every small dinosaur needs one fewer task.
Mass Migration and requirement tracking can change by branch or update. Do not base your entire route on a task you cannot find or confirm in your game.
Build a route you can finish
Handle age-limited tasks while still a Juvenile. Then combine feeding, drinking and zone visits along one route. Keep an alternative if an area is crowded, lacks food or does not suit your species.
Perfect Diet shortens the growing stages. Plan early rather than waiting until adulthood is close before travelling to finish requirements.
Check your status and expectations
EFG's checklist is not connected to the game server and does not confirm Prime automatically. At adulthood, inspect your character panel, mutation information and the status shown by the game. If you did not qualify, review uncertain tasks for your next life.
Prime does not replace control and positioning. Check your species at the relevant age, manage stamina and choose terrain before attempting a new matchup.
Elder ageing, decline and Entomb
EFG's Elder reference states that diet does not accelerate ageing from 75–100%. The calculator therefore separates this period from the first three stages. Prime and Frail also have different stat curves; one universal multiplier does not describe every species.
Entomb relates to ending a life and continuing mutation progression. Read the requirements and confirmation in your current game before using it; do not treat it as an ordinary character-save button.
Sources and scope
Tactical decisions and checklists are EFG editorial suggestions. The references below provide mechanic guidance or update announcements; community sources may lag behind the game. Check the branch, version and server rules when information differs.