I liked the first 3 commandoes games,
Behind enemy lines
beyond the call of duty and then finally
Commandoes 2
Unfortunatly Commandoes 3 seemed to be rubbish as you couldn't change resolution and crashed for me lots and didn't run too well. I had to quit playing it at some point due to it being too jerky. That was on my old computer though, but still, you can't change resolution and things hide at the sides of the screens, and in some places you can't get any decent angle on the situation which really annoyed me very much...
I've not played strike force but I'm not sure it's nice to play only 3 characters.
I think commandoes 2 was the best game in the series.