Commandos: Behind Enemy Lines (PC)
Commandos contains a single linear campaign composed of 20 big missions. The linearity isn't problematic; while there exists a best way to win each scenario, you always get plenty of room to be especially creative or just a little reckless. And because they're well designed and open-ended, you'll want to play most of them more than once. Any of these missions can be attempted cooperatively with up to five other players, each responsible for at least a single troop. However, the true pleasure in this game is coordinating the entire squad single-handedly, anticipating how a situation will transpire and watching it go according to plan or successfully improvising when things don't go your way. And what a pleasure - after you navigate your team through or past some 50-odd nonchalant German guards, destroy a vital enemy installation, and hijack a means of escape, you may well find Commandos sneaking its way to the top of your list.
Commandos Beyond the Call of Duty (PC)
Just about every good game gets an expansion pack or a sequel, not just because it's profitable, but because it's easy. The good idea's already there, and the existing technology can be recycled to make a game that feels comfortably familiar but with new and exciting content. Recent expansion packs like Starcraft: Brood War, as well as sequels like Myth II and Fallout 2, all bettered their predecessors. But Commandos: Beyond the Call of Duty, a standalone expansion to Behind Enemy Lines, ends up feeling like a shadow of its former self, being both shorter and more frustrating than the original.