Difficulty Levels and Perks
KF2 has four difficulty levels: Normal, Hard, Suicidal, and Hell on Earth. Each step up increases Zed health, damage, spawn rates, and aggression while reducing player damage. New players should start on Normal or Hard to learn Zed patterns before attempting Suicidal.
The 10 perk classes (Berserker, Commando, Support, Field Medic, Demolitionist, Firebug, Gunslinger, Sharpshooter, SWAT, Survivalist) each level independently through gameplay. Higher perk levels unlock powerful passive bonuses and active skills. Finding a server that matches your perk level range makes for the best experience.
How to Connect
In KF2, click Matchmaking, then Browse Servers. Filter by game mode (Survival, Endless, Weekly), difficulty, and map. Click a server to view details and join. You can also use the Steam server browser for direct connection.
Weekly Outbreaks add special modifiers that change each week — these are great for variety. Endless mode removes the wave cap, letting you play until your team falls. Custom servers may run modded maps and mutators from the Workshop.
Ready to find your server?
Browse the full Killing Floor 2 server list on LobbyLink with live player counts and uptime.