This game could of been better if it weren't for hackers but there are a lot of great things in this game you should try
The gameplay in Combat Arms is much simpler than other FPS games. In Combat Arms the bullets stay in the crosshair and the recoil in controllable for every gun in the game. You have to rank up to unlock more guns and you can only purchase weapons for 1,7,30 or 90 days. No permanent option unless you buy Nexon cash. Nexon cash enhances your variety of weapons and and lets you purchase weapons you can't regularly buy with GP. Weapons you buy with NX cash are sometimes slightly more overpowered and the weapons look way better than most weapons you can buy GP.
NX cash allows you to buy tons of stuff that will improve your character better than GP equips. You can purchase mercenaries, armor, and specialists. I think specialists are sometimes more overpowered than regular soldiers, because specialists are able to purchase special weapons regular characters can't use like flamethrower, auto turrets, grenade launchers, and much more which make them overpowered in a lot of ways. NX cash also lets you buy name changes, kill death ratio resets, base character change and even gender change.
In Combat Arms there are clans you can join. You can make or join a clan and do a lot of things like clan wars, make new friends, purchase weapons that you have to be in a clan to buy, purchase clan emblems and more. Clan wars in Combat Arms are intense and just feels more fun than just playing regularly. One thing that ruins the game are hackers. This game is one of the biggest hacked FPS game. Nexon tried hard to stop theme but hackers keep coming back and feels like its never going to end.
Overall Combat Arms is a good free fps game, but NX cash can be overpowered and the game is sometimes ruined by hackers but FPS gamers should give this a try and you will easily notice the game play is much smoother than other free fps games and the graphics stand out more.