Spider Mastermind is third and the last boss in DOOM.
This boss have plenty of attacks that you have to watch for and avoid. You must avoid lasers by jumping, crouching and hiding behind a column. Spider Mastermind will shoot at you but that's easy to avoid.
When you get him to about 50% of health boss will start to attack you with electricity. Jump on the column to avoid that and get good angle for an attack. Jump off before he hits you with a spike.
Strategy is simple, avoid his attacks and aim at his brain. You can use BFG to stun him and get some free shots. There are two BFG charges in the arena.
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