Bestandsextensie .OVL
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RollerCoaster Tycoon 3 Sprite
| Ads | OS | Software |
|---|---|---|
| WINDOWS |
 RollerCoaster Tycoon |
Overlay
| OS | Software |
|---|---|
| WINDOWS |
 MS-DOS |
Geogrid ASCII Overlay
| OS | Software |
|---|---|
| WINDOWS |
 GPSBabel  GeoVisu |