Any hints on solving this one? I can get into the tunnel, but it's an eternal stalemate there. No volume of anticreeper will cut into the tunnel, and the surges destroy everything in the tunnel about once per minute. Three hours now, and all I can do is rebuild my blasters and sit waiting.
Avoid losing your launcher at all cost. Moving it up to quick can get you into trouble. Keep it in the back and move it up two or three squares at a time through the tunnel. It also helps to take out the diggable terraine in the upper half of the tunnel. That way the bombs from the launcher do not have to travel so far. Hopes this helps.