One free burrito if you can find a way to rewrite this query without sub-selects or the use of the DISTINCT keyword.

SELECT DISTINCT
    t.id
FROM
    tag as t
JOIN
    item_prototype_tag as ipt ON ipt.tag_id = t.id
JOIN
    shop_item as si ON si.item_prototype_id = ipt.prototype_id
JOIN
    palette_item as pi ON pi.shop_item_id = si.id
WHERE
    pi.player_id = ?