Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_6612 ( "Title" text, "Year" real, "Platform(s)" text, "Director" text, "Producer" text )

### Question ###
What platform was used for the game directed by Bryan Walker after 2006?

### Accurate SQL ###

SELECT "Platform(s)" FROM table_6612 WHERE "Year" > '2006' AND "Director" = 'bryan walker'