I didn't get very far into Alien Rage, I'm going to admit that right off the bat. It was not, however, for the want of trying. There are parts in Alien Rage where the game decides that working properly is for losers, so it doesn't work properly.
Before deciding to pack it in and write these words, I had to restart an entire level since an elevator required to get to the next section wasn't activating. Reloading the checkpoint did not encourage it to work any better. Upon restarting the entire level, and shooting my mundane way back to the elevator, it worked.
Five minutes later, I was killed by some swarming enemies due to a lack of cover and had to restart. This time, a fresh checkpoint loaded -- a checkpoint that had suddenly placed a wall in front of the corridor I was supposed to walk down. I was not restarting the level again.
Playing any single level of Alien Rage is perishingly dull enough. Being forced to play through it three times is just plain cruel.