Is it Illegal to Use Assets from Another Game for Research Purposes?

Was just reading through the Ubisoft EULA again to see if there is any info on international laws, found bit at the very end:

So regardless of where you are located, your bound to the laws set forth in England (for product).

I think the bottom line here is that you can be held accountable in a court of law for breaching the “contract” (it’s not literally a contract, but is any easy way to look at it) you enter when agreeing to the EULA. The of being sued when not making any earnings off of it might be low, but that does not make it legal to do so, you are breaching the terms of the licence.