What can be said about primal fears? well it is an updated version of dead hoard, there just isn't really much change with this game there are only one or two variations of specimens that have a different size and skin texture but are still the same well let's go through the list.
-Moveable Props...(they can get in your way)
-Not enough enemy variation
-Enemies absorb way to many shots.
-Limited sprint 3 seconds(can't roll)useless since most enemies can catch up to you anyway.
-Cannot shop in peace(shop menu doesn't pause the game also cannot buy medkits)
-Re-used enemy jumper(which was in dead horde)
-Level design is dull and cliche'd.
-One level can take from 15 to 30 minutes to finish depending on difficulty.
-Melee weapon is useless in any situation and serves as a joke when you could be spriting away for 3 seconds.
Overall i would say this is an avarage shooter, no real innovating ideas or any new concepts, just reused boring ideas, if you are interested in shooters and just want some mind numbing fun, buy it, if you are looking for something new and interesting, don't buy it.
if you want something similer try nation red or zombie shooter which will prove more fun.