| Abbreviation | Definition |
|---|---|
| IAS | Invasive Alien Species |
| ICH | Intergalactic Crack Heads |
| ICOP | Interstellar Consortium Of Privateers |
| ICSC | Interstellar Capital Systems Consortium |
| ID | Imagine Dragons |
| IDB | Inter-Dimentional Bureau |
| IDC | Imperial Darklordz Clan |
| IDC | Instant Death Combo |
| IDF | Inter-Dimensional Federation |
| IDF | International Defense Force |
| IDF | International Domination Force |
| IDPD | Inter Dimensional Police Department |
| IDS | Imperial Dragon Starship |
| IFA | Imaginary Friends Anonymous |
| IG | Ice Gun |
| IGOR | Inter-Galactic Organized Robot |
| IK | Iron Kingdoms |
| IKS | Imperial Klingon Ship |
| IKV | Imperial Klingon Vessel |
| ILO | Industrial League Order |