Changed characters to keep consistancy with the story and more appropriate team setup

Updated AI loadouts
Updated AI patrols to more appropriate formations
Added Syndikat parked vehicles for better effect
Adjusted class ranks
Stopped AI wondering off on occasion

Added multiple points of player cover across the map most notably around military base north-west side for an alternative approach
Adjusted helicopter prop to suit the situation further
Adjusted some lighting in areas
Altered some AI difficulty levels
Added various props to make scenery more emmersive

Fixed spots players could get stuck
Altered some AI stances/difficulty and positions
Other minor fixes
Minor change to some building positions/elevations

Moved some AI spawns so as to not make gameplay unfair while keeping element of tactical wit.
Added saving feature and checkpoint (intended really for singleplayer).
Added brief for players to get information and immersion into the story.
Shortened lengthy task descriptions.
Added second armed pickup to accommodate 4 players. (Thanks to Rumpus Krampusson).
Small changes to player loadouts.
Fixed bug where AI would spawn in odd locations.
AI should not wonder away from play area as much.