IGN's major complaint, about the Worms series in general, as much as Open Warfare 2, was that battles proceed slowly. However, this, along with the inability to save or restart mid-battle, were their only complaints. One reviewer also noted that the game felt "less like 'another good Worms game', and more like a definitive compilation for fans that also happens to be portable".
The main grievance of IGN concerning the Worms series, including Open Warfare 2, was that battles are sluggish. However, this was accompanied by two other complaints: the inability to pause or resume mid-battle. A reviewer also noted that the game felt more like a compilation for enthusiasts rather than a fresh, excellent Worms experience.