Yea but it isn't the only Shock Troopers game so they should have known better. The game is not entirely without merit, but what gets me is the source of the slowdown. Instead of making the combat challenging by using a relatively low number of intelligent and dynamic enemies (like ST1, MS, etc..), they opted to do it with a huge quantity of incredibly stupid enemies that simply run straight at you. As a result of this laziness the sheer amount of enemies causes the slowdown, having the exact opposite effect that was intended and making parts of the game easy (and boring). When they saw this was the result of their ineptitude they didn't even care and shipped it anyway.
So rarely do you see a developer make a brilliant game and then follow it up with a sequel that is a real turd in comparison that when it happens it's worse than a developer simply releasing a one-off bad game. A bad game is a bad game (buyer beware), but even a mediocre game, when sold knowing people will buy it sight unseen expecting the same quality of its predecessors, is a betrayal of trust.