Pretty sure unity doesn't do that. In fact, I commonly hear the opposite: that it's ridiculously easy to hack and even decompile it's games. Now, I've heard of it storing values and addresses differently (so say the value is 4 bytes but the address isn't) but it's nothing cheat engine can't handle. For example, do unknown initial value, and then keep decreasing the value and searching for a decreased value (maybe with some unchanged value searches in there). Even if the address changes each time (like ren'py) the value won't (or, at least it won't magically increase). You'll eventually find it. I've done it myself in unity. It's the same way you find values in games that store them with a formula, like how how RPG Maker used to store values as n*2+1. And by default, unity values don't even do that. All values are stored unencrypted. If there's any kind of hack protection it's put there by the developer. It's not built in like RPG Maker.
I can also tell you for a fact that speed hacking isn't impaired in Unity. Tested it myself, works just fine. CE speed hacking works by injecting a dll into the program it's hooked to, and then returns slowed down or sped up ticks to the the system calls for timing the program makes (I think. It's been a while.) so the only way to really combat that is have the program detect the dll being injected (which most don't) or to have it cross check the time every few seconds with a server (in the case of something like an MMO).
