View Solution


Beat four Portal advanced maps.

3 guidesOffline Game ModeSingle Player
Crimson DrifterCrimson Drifter870,811
03 Feb 2009
35 0 0
Once you finish the regular campaign maps of Portal, you will open up 6 advanced maps available for play. The advanced maps are simply six maps you have played before, just some little tweaks to make it harder. You must finish any 4 of the 6 maps for this achievement (it does not matter which ones you complete as long as you have done 4 of them).

The below videos will guide you through each advanced map (they are in order 13,14,15,16,17, then 18)