can anyone help me remember the name of a video game i played?

ok, so heres what i remember about the game: it was a game where youre some kind of monster walking around a GTA-esque open world city, and you had the ability to eat people and restore your health, you could also try to eat the bad guys as well (or maybe it was the boss, i dont remember), but they would hurt you from the inside and you would have to spit them out. i dont remember the exact time frame i played it but im fairly sure it was probably made around mid-late 2000s or earlier, other than that i dont really remember much