Played demo originally but was kinda of grindy, anyone know of any exploits?
Once you get to the point you can breed mobs together for new mobs, fill your base to the max, then the newborns will spawn outside. You can take these, then sell them for a ton of cash if you're aiming for cash.
For XP, just save up enough money for pet food in town, then rail the highest level pet mobs you can over and over. You gain the ability to see more stats later on in the game, but just aim for those with the most stamina, and don't let their HP drop below half or so for safekeeping.
Speedhack the game at 5x and you can just phase through most walls, then lock the urine gage so you don't spend half the game covered in gamer fluids.