No IW put Call Of Duty on the map. Brought it to the big time.
Treyarch sucks.
Once Treyarch stole the CoD Engine from IW, the series steamrolled downhill.
CoD 4 was an excellent game, a great step into new territory. Gayarch stole the CoD4 Engine, edited it,
and came out with World of Fail. Activision ruined the CoD series by giving Gayarch the rights to take
the CoD engine. Activision wanted a CoD game out every year to bring in the $$$, but IW wouldn't have
it. IW was rushed when it came to MW2, Activision pressured them into a premature, therefore buggy
release.
Treyarch in association with Activision, ruined the franchise.