level 9:
portal on roof portal on ground (in line with each other)
start going through and its infinite, you go real fast. then in mid air stick a portal to the right of the first one (on the ground) and you will shoot up through it, thus giving height for jump.
Good way to do it:
have a bunker in bottom left with a signaller and officer in it. put a trench in front of this with a frenche in.
then put say a gunner and spec ops and engineer next to this.
you then need a trench in middle of map FULL of frenchies for decoys.
the spec ops and gunner and enginer will level up loads and be amazing (buy tommy gun or BAR for spec)
and every three rounds, uses artillery strike!
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