Spearhead was definitely my favorite from the AA era. The only issue I had with Allied Assault (which I'm installing again right now) was the final mission. It's fucking impossible. I just cheated.

I didn't care, I wanted to move on.
I still haven't finished Breakthrough, to be honest. I'm not sure why, it just doesn't feel put together as well. It's not bad, of course.
The other thing that's awesome about Spearhead? You're Gary Oldman. (Or rather, Gary Oldman is reading letters from the person your character is based on) Which is AWESOME.
Honestly, I'd suggest the Anniversary PC bundle (these games aren't on Console)
http://www.amazon.com/Medal-Honor-10th- ... 318&sr=8-3It includes all the PC MoH games except the latest one.
Pacific Assault is the weakest one, without a doubt. But it's still not a bad game. (It's actually very interesting if you play on realistic. It removes the hud entirely and crosshairs, they're still there, of course, but you can't see them. And oddly enough, it enhances the game)
Airborne isn't a bad game either and is pretty damn unique. You parachute into various areas ... this is the game they tried to introduce some RPG like elements to. Anyway, it's not as good as the others, but well above the more recent WW2 console ventures of the series. The game, to note, got panned, basically, because it was in WW2.
Anyway that's only $17 with free 3-5 day shipping. The WarChest is $13 with SuperSaver shipping, which means $4 or spend more than $25 ... ends up being cheaper to get the Anniversary edition.
I'd also like to note that the guys who made Allied Assault ... went on to form Infinity Ward and made Call of Duty ...Now, I know Olly hates Call of Duty ... HOWEVER ... I'm pretty damn sure he hates MODERN Call of Duty. The original games were very different. They were fun because of the shooter mechanics and diverse level design. The new ones are just set pieces. And I'm more pissed off about that than anyone being a CoD fan from the beginning.
Anyway those games have some of the best FPS gameplay I've ever played:
http://www.amazon.com/Call-Duty-United- ... 638&sr=8-1 And it's $30 for Call of Duty, United Offensive, and Call of Duty 2.
They're the good ones. And they're unbelievably great. Though, there isn't a lot of variation in what you're doing, the shooting and level design is ultra-solid. (Also, one of the first FPS' to aim down sights, which was actually necessary, and to have a incredibly diverse selection of weapons available to you on the battlefield)
Here's the first Demo they released for CoD1, Dawnville:
http://download.cnet.com/Call-of-Duty-D ... 39518.htmlIt's seriously good.