| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| did portal flash game come first | 0.86 | 0.1 | 6224 | 72 |
| portal game flash game | 0.14 | 0.4 | 4385 | 93 |
| what is the first portal game | 1.23 | 0.3 | 63 | 34 |
| portal the flash game | 1.07 | 0.9 | 5013 | 38 |
| when was the game portal released | 1.88 | 0.7 | 5262 | 67 |
| what game was portal based on | 1.28 | 0.9 | 2746 | 93 |
| when did playstation portal come out | 1.19 | 0.2 | 493 | 55 |
| who made portal game | 0.92 | 0.6 | 3454 | 59 |
| when did portal come out | 0.24 | 0.6 | 7008 | 67 |
| is the first portal multiplayer | 0.55 | 0.6 | 3742 | 34 |
| what year did portal come out | 0.14 | 1 | 4283 | 39 |
| when did the ps portal come out | 1.09 | 0.5 | 4680 | 17 |
| portal the flash version | 1.42 | 0.1 | 6253 | 61 |
| portal game release date | 1.62 | 0.5 | 7515 | 62 |
| portal the flash version download | 0.6 | 0.3 | 5921 | 77 |
| what is the newest portal game | 0.19 | 0.8 | 4267 | 41 |
| what type of game is portal | 0.87 | 0.3 | 534 | 5 |
| flash games ported to steam | 1.69 | 0.1 | 4616 | 91 |
