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4/5, it is almost perfect but it NEEDS a health bar, maybe regen hp, the portals sometimes shoot you off center when your going straight down...
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For level 6 get yourself on the platform. Close the portals by pressing D then place a portal on each target. Then jump and land on the portal underneath the down arrow and when you come out the other you should be high enough to reach the exit platform.
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For level 9 put one in the ceiling and one in the floor below. As you're falling from above put a portal to the right so when you land you jump higher out the right portal.
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Half of a portal is just a hole, but completing half of Portal: The Flash Game will unlock the Mindreader's Chalice.
Level 20 completed – Note: This MUST be completed on "Kongregate badge mode"! Best so far: 20.
Hurry, challenge ends in 7 days!
I still done have the card... and I beat level 20 in badge mode
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frankthedank to beat 15 set up 2 portals right next to eachother right next to the glass. run into the first one and hold down right. you should find out the rest
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@FranctheDank: heres how to do lvl 15: forst make a portal above you when you enter the room, then make another right before the glass the blocks you from the rest of the area, then jump toward the portal you just made while aiming at the white piece of floor beneath the camera beyond the glass (It might take a few tries to get it right), if done right you will land in the second portal you made and jump out the third one, make sure the timing is right so you don't get cought between the 2 lights that kill you :P, the rest of the level is simple.