you might also want to change the key for Duck/Crouch to Alt instead of Shift. Your pinky finger will get tired otherwise, and that'll make it harder to concentrate. Then you can just move your right thumb back and forth between Jump (Space) and Crouch (Alt) -- two keys you'll use often in this fight but never at the same time. Try to keep the T. rex in sight by shifting the camera as you circle around it -- using the left or right direction key and back key if necessary to keep moving away as you circle. Or, back away while weaving from side to side. If the T. rex gets too close, roll or jump out of the way. Then continue circling or weaving and shooting. Keep blasting away until the T. rex's rage meter maxes out and flashes red (as shown in this screenshot ). The rage meter is the lower of the two bars in the upper right corner of the screen. When the T. rex becomes enraged , it stops moving momentarily and lets out a loud bellow. Even if you can't hear it, you can see the graphic representation of sound waves emanating from its head (shown in this screenshot ). Then it charges. The action shifts to slow motion and the screen blurs slightly. Now you must use the adrenaline dodge you learned in the previous level. First, make sure you have weapons drawn and keep a target lock on the enemy. If