All Hitman 3 unlocks are listed here Hitman World of Assassination – Full List of Unlockables
Hitman 1 Unlocks:
Hokkaido – Situs Inversus
- Striker (Pistol, Super Damage, Piercing) – Complete all levels of The Dexter Discordance Escalation Contract
Yeah, same gun, just a different skin.
Escalation Track 2
TRACK 2: Complete X escalations on Hawke’s Bay, Miami, Santa Fortuna, Mumbai, Whittleton Creek, Isle of Sgàil, New York, Haven Island
- Tier 10 (Complete 26 escalations): El Matador (Pistol, Super Damage, Piercing)