| Map | Title | Author | Players | |
|---|---|---|---|---|
| ONS-Icarus | Icarus Plaza | Chris 'Plutonic' Blundell | Unknown | |
| ONS-Icybo2 | Icybo2 | ADES | 8-16 | |
| ONS-Icybo2 | Icybo2 | ADES | 8-16 | |
| ONS-Iguazu | The Iguazu falls | Toni 'scarface' Seifert | 12-32 | |
| ONS-Iguazu | The Iguazu falls | Toni 'scarface' Seifert | 12-32 | |
| ONS-Impregnable | Ons-Impregnable | Chris "Winston" Banks | 10-16 | |
| Ons-Impregnable- | Ons-Impregnable | Chris "Winston" Banks | 10-16 | |
| ONS-IonWarsEp1 | Ion Wars Episode 1 | Chaos_Snake | 12-32 | |
| ONS-IonWarsEp2 | Ion Wars Episode 2 | Chaos_Snake | 8-32 | |
| ONS-IonWarsEp3 | Ion Wars Episode ]I[ | Chaos_Snake | 16-32 | |
| ONS-IronFist5N | ONS-Iron Fist 5N | Alex64 | 10-14 | |
| ONS-IronSpine-Fixx0r | RAF Iron Spine | Anthony "Ebeneezer" Smith | 10-20 | |
| ONS-IslandHop-HoverMeUp-beta1 | Island Hop - Hover Me Up | Ben Beckwith, Wormbo | 8-16 | |
| ONS-IslandRock | Island Rock | Sami "Fira" Bashir | 20-32 | |
| ONS-{IGS}Simpsons--Home--Invasion-Final | ONS-[IGS]Simpsons-Home-Invasion | UNREALLOCO AKA [IGS]LOCO | Unknown |