Infinity Ward has explained in detail the Call of Duty: Ghosts Perk system.
The game includes 35 Perks, each of which is weighted with a point value of 1-5, the developer explained in a blog post.
Your loadout has a pool of eight points to spend on Perks, but you can raise this to 12. In addition to the initial eight points, a single Perk point is tied to the Primary Weapon slot, Secondary Weapon slot, Lethal and Tactical. You can take away one of these items for an additional Perk point, allowing for a maximum of 12 points to spend.
So, if you fancy it, you can forego all weapons and equipment and start each spawn with only a knife and 12 points worth of Perks.
Each Perk has a level and a Squad Point cost. Once you reach the listed level, the Perk is automatically unlocked. If you want to unlock it early, you can spend the listed amount of Squad Points.
Each Perk belongs to one of seven different categories: Speed; Handling; Stealth; Awareness; Resistance; Equipment; and Elite.
Here's the Perk category list, with official descriptions and examples of each.
- Speed: Outrun and outmaneuver enemy players. Speed Perks are all about getting the lead and staying ahead. Examples include Sleight of Hand (Faster reloading) and Stalker (Move faster while aiming).
- Handling: Dexterity and control drives the Handling Perks, improving actions and accuracy. Examples include On the Go (Reload while sprinting) and Steady Aim (Increased hip fire accuracy).
- Stealth: Stealth Perks aid you in staying out of sight, maintaining a low profile and engaging on your terms. Examples include Takedown (Kill enemies without revealing their death locations) and Incog (Resistant to targeting systems including Recon, Thermal Scope, Tracker Sight and Motion Sensor. No name or red crosshairs when targeted).
- Awareness: Keep in tune with your surroundings. Awareness Perks help you survey the environment and detect enemy players. Examples include SitRep (Detect enemy explosives and tactical equipment) and Wiretap (Utilize all active enemy and friendly SAT COMs on the field).
- Resistance: A hardened endurance reduces the effects of fatigue. Resistance Perks keep you going through tough engagements. Examples include Focus (Reduced weapon sway when aiming down sights and reduced flinch when hit) and Blast Shield (Increased resistance to explosive damage).
- Equipment: Tacticians swear by their gear, and Equipment Perks ensure you have the best tools on hand. Examples include Extra Tactical (Additional Tactical equipment) and Extra Attachment (Extra attachment for your weapons).
- Elite: Elite Perks offer special abilities that affect your loadouts in a variety of ways. Examples include Gambler (Spawn with a random Perk) and Ping (Activate a sonar ping upon killing an enemy, revealing nearby hostiles).