>>715190462IOI have created the worst buying experience around, it's genuinely impressive, honestly.
Don't buy anything but Hitman World of Assassination. You can get a Hitman 3 CD key and that'll turn into WOA too, it's probably the cheapest option.
Don't get anything else. Ignore the 'episode' shit, ignore the 'part 1' shit all of that stuff is IOI being complete fucking retards who have no idea how to sell their game and basically scamming people who don't realise they are getting fucked.
If you really, really want 'basically everything' you can grab deluxe or get the 'Hitman 3: Hitman 2 pass' later to add the missing two levels.