Talk:SAS: Zombie Assault 4/@comment-50.137.232.250-20140412014858/@comment-197.161.70.207-20140420124222

You can pay NK coins to purchase Strongboxes better than Titanium, giving you more chances to get weapons. You can also pay for instant revives and $A$ credits. Two character slots require NK coins to purchase. However, premiums do not really take away from the experience - they just ease it.

I'm saying premiums are pay-for-convenience, rather than paywalls. You can still play the entire game without paying a cent. Nothing can only be acquired by paying.