What was the minimum operating system required by Stunlock Studios' game?
CREATE TABLE table_43623 (
    "Developer(s)" text,
    "Release date" text,
    "Required OS" text,
    "Genre" text,
    "Type" text
)
SELECT "Required OS" FROM table_43623 WHERE "Developer(s)" = 'stunlock studios'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What was the minimum operating system required by Stunlock Studios' game? ### Input: CREATE TABLE table_43623 (
    "Developer(s)" text,
    "Release date" text,
    "Required OS" text,
    "Genre" text,
    "Type" text
) ### Response: SELECT "Required OS" FROM table_43623 WHERE "Developer(s)" = 'stunlock studios'