| Map | Title | Author | Players | |
|---|---|---|---|---|
| ONS-EarlyDawn | Early Dawn |
 Epic Games
|
Unknown | |
| ONS-ECE-Doomed | Doomed | 10-20 | ||
| ONS-Echo-100 | Echo | 12-24 | ||
| ONS-Echo-101 | Echo | 12-24 | ||
| ONS-Echo-102 | Echo | 12-24 | ||
| ONS-Eire | Eire | 4 | ||
| ons-escalade_night | ONS-Escalade night | 14-24 | ||
| ONS-Evergreen | Evergreen | 16-32 | ||
| ONS-Evergreen | ONS-Evergreen | Unknown | ||
| ONS-EvilMood | EvilMood | 8-16 |