Collect the indicated number of artifacts to unlock the corresponding concept art.
| Art | How to unlock |
| Allies | 12 Artifacts.
|
| Co-op Levels | 8 Artifacts.
|
| Cutting Room Floor | 36 Artifacts.
|
| Enemies | 22 Artifacts.
|
| Extras | 20 Artifacts.
|
| Istanbul | 28 Artifacts.
|
| Nepal | 26 Artifacts.
|
| Odin And Seabed | 32 Artifacts.
|
| Panama | 18 Artifacts.
|
| San Francisco | 14 Artifacts.
|
| Sudan | 2 Artifacts.
|
