The merc with the mouth ain’t facing censorship, that’s for sure.
Rated M for Mature due to “Blood and Gore, Intense Violence, Mature Humor, Sexual Content, Strong Language”, the ESRB has provided a description for the action in its summary, stating that, “Battles are frenetic and accompanied by screams of pain, gunfire, and large blood-splatter effects. Some attacks result in dismemberment or decapitations; body parts and bloodstains can be seen on the ground.
“Players can also employ stealth attacks, in which close-up camera angles depict more severe damage against enemies. Throughout the game, the protagonist provides irreverent commentary and jokes amidst the exaggerated acts of violence (e.g., “No guts no glory” when hanging from his entrails; “Oh that’s gonna leave a mark” when dismembering an enemy; “That’s because you have more comics than me” when repeatedly beating a character on the ground).”
And that’s just the nice stuff (seriously). Check out the full summary here.