"First of all you have to get past all of the platforms by finding all the red switches and also aoiding the U3. Finally when u get to higher ground (or SOLID GROUND) continue on and he will appear, variously lead him near red barrels, shooting them when he is close to them, and shutting gates so you can shoot him while he is busy with the gate. Then just run around avoiding him and shooting at the same time!!!!"@en . . "First of all you have to get past all of the platforms by finding all the red switches and also aoiding the U3. Finally when u get to higher ground (or SOLID GROUND) continue on and he will appear, variously lead him near red barrels, shooting them when he is close to them, and shutting gates so you can shoot him while he is busy with the gate. Then just run around avoiding him and shooting at the same time!!!!"@en . . "How do you beat U3"@en .