Although the PC version is actually quite inferior to the console version, it still stands as the greatest third-person perspective co-operative war-themed videogame to ever exist and I'm going to explain why in extremely thorough detail.
The ability to command a squad actually has significant value in this game. Because the squad consists of merely 2 to 4 unique soldiers, progressing through the game will actually have you grow a heavy attachment toward them (some more than others, due to either preferring a specific weapon set or merely for the personality of the character). For this reason, this game could be considered the original Team Fortress, and the game's sequels further elaborates upon their existing personalities.
As the squad is your most viable resource, you are made to take extra precautions to ensure the safety of every man. This is a very fun task as you are given almost literally complete control over everything your squad does. Don't want Foley to carry his sniper rifle for some reason? Give it to Bradley! Don't even want Foley to participate? Leave him behind! I must admit, the storyline and graphics are sadly not quite up to standard and could use some work, but in the end the gameplay is all that matters, and it more than makes up for the lack of creative in-game dialogue and pleasing textures.
The beat thing about this game, in my opinion, is the freedom you're presented upon entering a mission. I've already explained controlling the squad, but another aspect that many other games don't seem to contain very often is the freedom to be able to tackle the situation anway you desire. Whether it means trying to find and destroy every enemy vehicle and weapon pickup or merely sprint through everything achieving the bare minimum, as long as you achieve the task one way or another it doesn't matter.
This game is great stuff, and I hope to see some of the other games in this franchise in the Steam store sometime, perhaps even with a multiplayer mode or something.