To access the easter egg:
1. In town, head to the Research Center (or whatever it is
called), when you reach the steps (before walking up), turn 90 degrees
to the right. Walk straight for the gate with the blockades in front
2. Go around the blockades and get to the gate itself. It has two
beams "locking" it shut.
3. If you're really Trespasser savvy, you shouldn't have much
difficulty climbing up to gate. (keep jumping, and walking forward
until you are at the top). Don't worry about falling off to the other
side, there is one of those invisible boundaries here. You couldn't
walk off the wall if you wanted to.
4. Balance on the gate and get onto the wall (to the right). Now
walk on the top of the wall towards the church and Hammond's house.
5. Way before you reach anything, you will see a niche in the top
of the wall. Don't try to jump over it. Just keep walking. The
computer will suddenly load up the easter egg level.
The level has: all the weapons, a raptor, two gold bars(?????), a
gray InGen card, a HUGE stone domino set (that you can really knock
over...I felt like National Lampoon's at Stonehenge), each of the four
corners are marked with a funky floating cube, a large floating paper
airplane-like thing pointing to a little path in the land (if you
follow the path you can safely "fall" off the world onto the white
"nothingness", where, I suppose, you are stranded for all eternity.
Some vacation.), a severed human head (one of the folks at
DreamWorks?), and several perplexing "markings" on the ground (one
appears to have a "beam" of light shining on it from heaven). To make
things worse, Annie keeps saying odd things like, "It looks like it
wandered off the trail" or something like that.