Sabotain: Break the Rules (2004, Avalon Style Entertainment)
Not sure how I'd never heard of this one until my friend stumbled upon it. It's basically Russian Deus Ex with extra jank.
From what I've played so far it seems very ambitious. There are a ton of large, open, and very unique maps, a day/night cycle, and even the ability to buy vehicles (and you'll definitely want one with how huge some of the areas are).










