Class system or unique perk cards.

Most runs feel similar each time picking a perk that either makes you tougher or make you deal more damage. I suggest a system that you unlock as type of meta progression similar to weapons but instead of kills its a challenge requirement. Though they can also be mission modifiers for the player.

If it is a unique perk it can be found similar to dead drops but are not exclusive to specific safe houses. After extracting with it they give you 3 choices to choose from but they get taken out of the pool after you get it. Could also have them as Rare perks.

If it is a class you pick it at the loadout menu at the start of the run under your backpack.

The perks are

• Grenadier - +2 max grenades -30% max ammo

• Scavenger - +30% final damage with scavenged weapons. Shop and dead drop is 30% more expensive

• Glass Canon - +50% final damage. Max hp is fixed at 40 and armor is half as effective.

• Silent Assassin - +40% final damage to unalerted enemies with a silencer but -20% base damage vs alerted enemies

• Reload Rig- Weapons reload automatically when holstered (6 secs base reload). +50% reload speed when reloading with an active weapon.

• Medic- +30% more healing when healing other players and healing can over heal -30% less self healing

• Ammo Junky - +40% max ammo but -20 move speed

• Speed Demon- +30% move speed and crouch speed but take 50% more damage

• Dead drop fan- You get 1 free dead drop per main mission and you can extract with a extra dead drop but shop is 2x more expensive

• Psycho- Armor regenerates slowly when killing but it degrades after a short period of time and you cant use above a single plate.

• Berserker- Health regenerates slowly in combat but you can not have armor.