Veins

Veins is a Single Player level in Q2. This level has the same geometry as Wech War, though placement of Ammo and Weapons is entirely different.

Walkthrough
Turn left and kill the 2 Rottweilers. Proceed down the corridor and enter the doorway on your right. Kill the 4 Grunts and collect the three 25 Health on the far side of the room. Return to the corridor and proceed to the end, then go through the doorway straight ahead. Kill the 2 Grunts, Knight, and Rottweiler. Collect the 3 Shells to the right, then go through the doorway straight ahead. Kill the 3 Grunts and proceed down the corridor. Ignore the doorway to your left and instead go through the one straight ahead. Collect the Green Armor to your left, then turn around. Kill the Fiend to the left of the doorway straight ahead and collect the Thunderbolt to the right of the doorway straight ahead. Ignore the doorway to your left and instead go through the one straight ahead. Kill the 2 Scrags and collect the 3 Nails to your right, then go through the doorway to your left. Kill the 3 Grunts and collect the Quad Damage to your right, then go through the doorway straight ahead. Collect the 2 Cells and two 25 Health to your left, then the 2 Cells to the right beside the doorway. Enter the doorway to kill the 2 Ogres, 2 Death Knights, and Shambler. Return to the last previously ignored doorway and go through it. Kill the 3 Grunts and the Fiend, then collect the Rocket Launcher in the upper right corner. Turn around and go through the doorway diagonally across from you on the right. Kill the 2 Scrags and Knight. The doorway to the left is one of the doorways you previously ignored, so go through the doorway to the right to kill 2 Grunts. Ignore the doorway to the left and instead go through the one to the right. Kill the 2 Knights, then go through the doorway to your left. Kill the Ogre and 3 Rottweilers, then turn right. Collect the 3 Rockets to the right, then go through the doorway straight ahead. Kill the 2 Zombies and collect the Nailgun to your right. Turn around and go through the doorway at the end of the corridor to kill 2 Ogres and a Fiend. Collect the Pentagram of Protection in the lower right corner, then return to the previously ignored doorway and go through it. Kill the 3 Grunts and turn left. Collect the Green Armor to the left. There are two doorways here, go through the one on your left. Kill the Grunt and Ogre. Collect the Nailgun in the lower left corner, then go through the doorway to the right. Kill the 3 Grunts. Collect the Double-Barrelled Shotgun to the left, the doorway to the right leads back to the most recent room with the two doorways.