Painkiller: Battle Out Of Hell.. i need help

[hypocrisy86]

I'm trying to kill alastor..
But... i dun't know what the fuck to do
I see bout 4 round circles... glowing.. but what do you do?? seriously.

 

[hypocrisy86]

bump

 

[hypocrisy86]

I'm at the end of the game,
Alastor is the new "satan"..
and.. well i shot him with like over 800 rounds of each weapon
Jumped on those cirlces, shot the circles, led him on them shot him on it
I .. can't figure this shit out ..

 

[hypocrisy86]

Bump.