easy/kid: must be in middle school or younger for this 13 yrs old or lower in this mode you open your laptop and find out school is canceled due to dinosaurs being everywhere and there being illegal dinosaur traders around the world you wont have a lot of run ins with dinosaurs it will be rare try to live your normal life. casual/teenager: must be from 14yrs to 18yrs old pretty much the same as kid mode but a bit more run-ins. hard/adult: must be over 18 yr there will be much more run ins.