There's only red and green ones. You use them to heal yourself. If you combine the red and green together, then they're stronger.
Yeah what Danny said, Also if you have the first aid spray and use that ALWAYS try to make sure your stood next to your parnter when you sue it as you can heal you both at the same time.
It's a wicked game like, been playing it through a few times to get all of the weapons and shit. Completed Mercenary mode with an 'S' on every level as well. You can tell I've had a bit of time off!
It's a dire game not helped by the terrible AI of the cunt with you using all the bullets and getting shot to fuck all the time, however shooting Africans was a plus!
I only played the demo but didnt like the over the shoulder camera view and awkward as fuck controls, shame cos res 1, 2 and nemesis are some of the best games ever
i played the ddemo on the ps3 and tought it looked quality but played shite so never bothered then about 3 month ago i saw it in asda for £25 and played the co-op with me mate and thought it was quality
i find the aim a bit naff its hard to see if your laser sight is on a blackmans head... i tend to use the rounds hitting to aim
