Please be as specific as possible when letting us know what is missing or incorrect. For example, say "this game's trophy difficulty should be 8/10", with a link to a website corroborating this difficulty estimate (if possible), not "this game's trophy difficulty is wrong".
The HITMAN 3 Access Pass system allows you to access HITMAN 1 and HITMAN 2 locations in HITMAN 3, essentially making it possible to play all locations in the World of Assassination trilogy from within HITMAN 3.
Purchasing or redeeming this Access Pass will grant access to the locations from 'HITMAN 1 - GOTY Edition' in HITMAN 3.