Stealth Inc. 2's visual design is solid. Most of it is exclusively in service of the gameplay, and the rest of it is reserved for developing the game's silly but sinister tone. You have a decent view of your surrounding areas at all times. Where you can go and where you can't go are very clearly detailed. More importantly, two visual clues establish exactly how visible your clone is at all times. One is extremely clever, and the other is about as subtle as a brick to the face. Clones wears goggles that glow green; picture the minions from Despicable Me mixed with Sam Fisher, and you've got an idea of what they look like. The other indicator is a sentence at the bottom of the screen that straight up tells you how visible you are. The cartoonish, somewhat cutesy aesthetic belies the fact that not only is this game dark and sardonic, but it's a much more physically and psychologically violent game than any Splinter Cell. Speaking of Ubisoft's flagship stealth franchise, it takes a page from the two most recent entries in that series and projects text on the wall. Granted, this feature is almost exclusively reserved for storytelling and tutorial purposes, but it bears mentioning.
There's no dialogue in Stealth Inc. 2, and ultimately, I think that's for the best. Firstly, it goes a long way in establishing how impersonal and callous this world is. You are literally just another clump of flesh that has been imbued with the spark of life for the sole reason of having the resultant flame snuffed out with impunity. All that you're left with are the sounds of your footfalls, the legion of mechanical obstacles, and the horrific sounds that accompany every messy fatality. Musically, the sound design fits both the visual style and the gameplay quite admirably. It's not cinematic or rife with bombast, but it's certainly at home with the "deadly laboratory" motif.