2 serials | half life opposing force 
| Date | OS | Name | Version | Rating |
|---|---|---|---|---|
| 2011-04-11 | PC | HALFLIFE OPPOSING FORCE |
XX | 60.00% |
| 2006-01-01 | PC | Half Life Opposing Force |
? | 70.00% |
| Date | OS | Name | Version | Rating |
|---|---|---|---|---|
| 2011-04-11 | PC | HALFLIFE OPPOSING FORCE |
XX | 60.00% |
| 2006-01-01 | PC | Half Life Opposing Force |
? | 70.00% |