Call of Duty 2

Call of Duty 2 came out in 2005 and basically took everything the first game did and made it bigger, louder, and way more cinematic, cementing the franchise as the king of WWII shooters for years to come. You're still bouncing between three campaigns—American, British, and Soviet—but this time the levels are larger, the set pieces are crazier, and the game leans even harder into that "you're just one soldier in a massive war" feeling. The big gameplay change here is the shift to regenerating health, which ditches the health packs from the first game and lets you recover from damage by hiding behind cover for a few seconds.

That one change completely altered how the game plays, because now you're encouraged to push forward, take risks, and stay in the fight instead of hoarding health and creeping around every corner. The gunplay feels punchier too, with better iron sights, more responsive aiming, and a wider arsenal of WWII weapons that all sound and feel distinct from each other. Your AI squadmates are still useful, barking orders and clearing rooms alongside you, and the game loves throwing scripted moments at you—storming the Pointe du Hoc cliffs, defending Stalingrad, charging across the North African desert—that make you feel like you're inside a Hollywood war movie.

There's also a new emphasis on smoke grenades and flanking, which adds a tactical layer to the chaos. It's short and linear like its predecessor, but the pacing is relentless, the atmosphere is thick, and the multiplayer was a huge deal back in the day. Call of Duty 2 didn't reinvent the wheel, but it polished it to a shine and set the standard for every military shooter that followed.