The House of the Dead III

This is one of the 3 hard trophies in the game but it's not really that bad. The trick to clearing this mode is speed (obviously) and NOT GETTING HIT. What I mean by this is: do not care about headshots or accuracy. Just focus on killing as many zombies as you can because you get time for killing enemies and you lose time when you get hit. Hidden items (in barrels, boxes, etc) will be clocks that add 7 seconds to your timer so it is worth shooting them when you have the chance to see if clocks are there. Also the rescue sequences will net you 10 seconds if you succeed at them.