| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| does portal 1 have co op | 1.12 | 0.6 | 6442 | 24 |
| portal 1 co op | 1.44 | 0.6 | 4032 | 42 |
| portal 1 co op mod | 0.5 | 0.8 | 9357 | 49 |
| how to play portal 1 co op | 0.35 | 0.5 | 1812 | 67 |
| does portal 2 have online co op | 1.45 | 0.7 | 6747 | 7 |
| does portal 2 have local co op | 0.34 | 0.4 | 975 | 82 |
| is portal 2 co op | 0.7 | 0.2 | 6476 | 46 |
| is portal co op | 0.57 | 0.2 | 575 | 78 |
| does portal 2 have coop | 0.98 | 0.3 | 2438 | 43 |
| portal 1 in portal 2 coop | 1.1 | 0.8 | 3573 | 94 |
| does portal 2 co op save | 1.36 | 0.7 | 5166 | 1 |
| does portal have coop | 0.25 | 0.7 | 1599 | 35 |
| does portal 2 coop have a story | 0.63 | 0.1 | 6057 | 97 |
| portal 2 co op levels | 0.14 | 0.8 | 4503 | 63 |
| co op portal 2 guide | 1.5 | 0.1 | 498 | 83 |
| is portal 2 coop online | 1.03 | 0.8 | 2317 | 51 |
| portal 1 co-op mod | 2 | 0.7 | 1704 | 34 |
