There is a fan-made Jurassic Park game based on the Half-Life engine. Happy new year!

Though created for different mediums and concerning totally different worlds, Half-Life and Jurassic Park share an overarching theme, one at least as old as Mary Shelley: experimental science, taken too far, can have enormous destructive power. Now, they share something else: an engine. The fan-made Jurassic Life is a first-person shooter set in the world of compys and triceratops poop and Richard Attenborough; it uses the Half-Life 2 engine.

Allow me to say, on behalf of the other thing JP and HL surely share (millions of fans), clever girl.