the animals in the first predator level and a part of the corporate were pretty cool except the worms hated the worms...... the energy flechette was actually pretty good for some things not all though i preferred speargun. the double pistols are cool too. But the greatest improvement was probably the predalien headbite. i mean it makes the predator even more deadly than before which i didnt think was possible. the graphics are almost exactly the same but i mean it an expansion pack its supposed to look the same. i thought it was cool how the alien and predator stories met. ur actually inside the predator that you be which is a first. and it explains how the predators in the orignal got there and why one of the pods was down. i thought it was good but thats just me.