Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Title | Year | Platform | Developer | Publisher |
| --- | --- | --- | --- | --- |
| SWAT 3: Close Quarters Battle | 1999 | Microsoft Windows | Sierra Northwest | Sierra Entertainment |
| SWAT: Global Strike Team | 2003 | PlayStation 2, Xbox | Argonaut Games | Argonaut Games\nSierra Entertainment |
| SWAT 4 | 2005 | Microsoft Windows | Irrational Games | Vivendi Universal Games\nSierra Entertainment |
| SWAT 4: The Stetchkov Syndicate | 2006 | Microsoft Windows | Irrational Games | Vivendi Universal Games\nSierra Entertainment |
| SWAT Force | 2006 | Mobile phones | Kaolink | Vivendi Games Mobile |
| SWAT: Target Liberty | 2007 | PlayStation Portable | 3G Studios | Sierra Entertainment |
| SWAT Elite Troops | 2008 | Mobile phones | Rovio Mobile | Vivendi Games Mobile |
Question:
swat force was the only game to be played on what?
Answer:
Mobile phones