You evolve your shark with different biological enhancements (like bio-electric or bone armor) to become a "Megalodon" and take on apex predators.
If you are following the community discussions around this release, you can find active threads and troubleshooting on the CrackWatch subreddit . Maneater-EMPRESS
The base game caps at level 30, but the Truth Quest DLC (included in the EMPRESS crack) allows you to level up to 40. You evolve your shark with different biological enhancements