HITMAN 1 (base edition) was given away for free on Epic Games last August (https://redd.it/ihmnr3). If you grabbed that (or bought it), you can now upgrade it for free to a Game Of The Year Edition!

Here's how:

1. Add the free Hitman 3 Starter Pack to your Epic account: https://www.epicgames.com/store/en-US/p/hitman-3--free-starter-pack (this counts as owning Hitman 3, a requirement for the next step)

2. Go to the HITMAN 3 Access Pass: HITMAN 1 GOTY Edition page: https://www.epicgames.com/store/en-US/p/hitman-3--access-pass-hitman-1-goty-edition-01

3. There will be a price still here. Click on BUY NOW and it will be 100% discounted!

You now own and can play Hitman 1 GOTY Edition within Hitman 3!