Complete each achievement to get the allotted gamerscore.
| Unlockable: | How to unlock: |
| Completed Welcome (10) | Successfully complete the Welcome To Rapture Level. |
| Maxed One Track (20) | Purchased every slot in one of the Plasmid or Tonic tracks. |
| Maxed All Tracks (50) | Purchased every slot in all four Plasmid and Tonic tracks. |
| Bought One Slot (5) | Purchase one slot in any Plasmid or Tonic track. |
| Upgraded a Weapon (5) | Acquire at least one weapon upgrade. |
| One Fully Upgraded Weapon (5) | Fully upgrade one weapon. |
| Two Fully Upgraded Weapons (5) | Fully upgrade two weapons. |
| Three Fully Upgraded Weapons (10) | Fully upgrade three weapons. |
| Four Fully Upgraded Weapons (10) | Fully upgrade four weapons. |
| Five Fully Upgraded Weapons (10) | Fully upgrade five weapons. |
| Weapon Specialist (20) | Acquire all upgrades for all weapons. |
| Fully Researched Thug Splicer (10) | Fully research the Thuggish Splicer. |
| Fully Researched Gun Splicer (10) | Fully research the Leadhead Splicer. |
| Fully Researched Spider Splicer (10) | Fully research the Spider Splicer. |
| Fully Researched Houdini Splicer (10) | Fully research the Houdini Splicer. |
| Fully Researched Nitro Splicer (10) | Fully research the Nitro Splicer. |
