| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Objetivo: Madrid - Parte 1 | Galo Alcolea | 1989 | Spanish | |
| Olimpo en Guerra | Eduardo José Villalobos Galindo | 1989 | Spanish | Solution |
| Omeyad | Ubi Soft | 1989 | French | |
| On the Run | Alfo Software | 1989 | English | |
| Once Upon a Lily Pad | Global Games |
1989 | English | Solution |
| Ooze: Creepy Nites | Dragonware | 1989 | English | Solution |
| Orbs of Derra, The | Coco-Cassette, T&D Subscription Software | 1989 | English | |
| Orifice From Outer Space, The | Plasma Touch Software | 1989 | English | Solution, Hints |
| Ork! House of Fortune | Brett Walker | 1989 | English | Map, Hints |
| Overdog | Mega-Soft | 1989 | English | Solution |