Well I can understand your situation. But Sony’s terms only allowed HITMAN: THE COMPLETE FIRST SEASON to be free in February.
Remember IOI do not control the PS+ Schedule. If you say this would have been your first HITMAN game then I have to tell you that I bought HITMAN: THE COMPLETE FIRST SEASON back for Steam PC, so this PS+ Free Game deal was just a little extra for us since we already bought the game on Steam.
If you haven’t ever bought this game, then I can tell you it’s worth it. The World of Assassination concept is that if you buy at least THE COMPLETE FIRST SEASON, you get the same levels for free in new HITMAN 2 form in HITMAN 2.
Also, note that unlike HITMAN: THE COMPLETE FIRST SEASON, HITMAN 2 STARTER PACK is free forever and basically if you own THE COMPLETE FIRST SEASON you will already at least have the Legacy Pack versions of these maps for free in HITMAN 2 STARTER PACK.
Then if you’re ready to go you can buy the rest of HITMAN 2 to experience the six new locations as well as the new Sniper Assassin Mode and PVP Ghost Mode where two players compete for Target Kills.
You can’t go wrong with even a basic purchase of HITMAN if its unique form of gameplay is really what you’re after.