Hi. i need help with an applescript, because i think it works, but it doesnt.

Question

--here is some of the users
choose from list {"Kin"}
set resultofkin to {"Kin"}
set resultofgames to {"Play Games"}
set resultofminecraft to {"Minecraft"}
set resultofsteam to {"Steam"}
set resultofblockland to {"Blockland"}
set resultispassword to {text returned:"400401", button returned:"OK"}
if resultofkin is {"Kin"} then
    display dialog "Sorry, but you will have to enter a password." default answer ""
    if resultispassword is {text returned:"400401", button returned:"OK"} then
        choose from list {"Play Games", "Turn Alfred On"}
        if resultofgames is {"Play Games"} then
            choose from list {"Minecraft", "Blockland", "Steam"}
            --minecraft
        end if
        if resultofminecraft is {"Minecraft"} then
            tell application {"Minecraft.app"}
                activate
            end tell
        end if
    end if
    --alfred
    if resultthatisalfred is {"Turn Alfred On"} then
        tell application "Alfred 2.app"
        activate
        --blockland
    if resultofblockland is {"Blockland"} then
        tell application {"BlocklandLauncher.app"}
            activate
        end tell
    end if
    --steam
    if resultofsteam is {"Steam"} then
        tell application {"Steam.app"}
            activate
        end tell
    end if

Answer 1

You are missing an end tell for the Alfred 2.app and a couple of end if statements at the end, but if you are looking at using the results of a choose from list command to select applications to activate that is not going to work.  As it is, you are just activating everything, since all of your comparisons will evaluate to true.
The display dialog and choose from list commands return a result that can be placed into a variable, that can then be used in your comparisons.  Take a look at this article for a tutorial on user interaction.