Do you own the IP to Chernobyl or what?

looks like european fallout 3 with left handed guns, is the story and gameplay good? (no spoilers pis)

why cant I complete the destroy the duty quest? Ive killed all duty members around there their leader skull, died from the freedom-sniper I killed before

When i use medkit from dead body my game crashes is there any way to fix it?

Just getting started with the series and I'm trying to decide between Stalker complete and Singularity. I'm looking for a "vanilla +" experience for my first playthrough and it seems like one of these would be the best fit, I really like the sound of having actual working stealth and more realistic headshots from Singularity but I've heard SC is more finished and has more in the way of bug fixes and such....