Fun fact, Gears of War Tactics is a game you may or may not have heard about, started as a simple Kismet script in Gears 3. They developed a small Proof of Concept as early as 2010 and seems they may have thought it was a good idea to keep going with this idea. A small level of Gears of War: Tactics. The AI seem to not want to go in doors and activate shit so oh well.
Exactly, the Kismet system wasn't great for developing games but for prototyping not that bad. Gave birth to the blueprint system in UE4 though.