I tried Day of Defeat: Source again recently and was expecting it to be dead. After all, the game is almost a decade old now. However, I was still able to find several populated servers at all hours of the day or night. Old age hasn’t killed DOD:S.
If anything age has worked in DOD:S’s favor. For example, it attracts an older and more mature crowd. I haven’t had to put up with as much drama or slurs from annoying prepubescent teammates as I do in more modern multiplayer shooters.
Another example of age helping the DOD:S experience is how “old school” it feels. Despite the WW2 setting, DOD:S plays more like an arena shooter from the 1990s than today’s super serious military shooters. Forget aiming down iron sights. Secondary fire for most weapons throws solid punch instead. Expect to spend a lot of time zipping about, shooting dudes with crosshairs, punching them for good measure, and laughing at the exaggerated ragdoll physics.
Day of Defeat: Source is not a masterpiece but it’s worth a look if you have a hankering for a shooter that isn’t too serious.