This is how you get the Games Easter Egg for Ice Age (Disk One)
1. Go to "Special Features"
2. Go to the THX Logo
3. Use the DVD Remote and press the numbers 1, 1, 3.
If you do all of this correctly, you will get the games Hide and Eek, Frozen Pairs, and Playing Darwin.
All easter eggs were generously submitted by SirDonk