The original soldier of fortune especially online was my go to game at the time.
That Death Match was just so good because of how varied and awesome the weapons where. Like the HMG had an alt fire that shot a posperus grenade so you could bounce is round corners and kill like 3 people you had no idea where there.
The slug thrower was awesome, the microwave gun was just lol people evaporated, but honestly my fav weapon was the knife. Insane RoF, insta kill headshot, you could just hold down mouse1 and walk through people killing them instantly. Add in the insane movement speed of the player and it was my go to weapon for flag defence in CTF.
God I loved that game.