Table: online_games
Columns: developer_s
release_date
required_os
genre
type

Question: What type of 3D game was released between 2008-2011?
SQL: SELECT "genre" FROM online_games WHERE "type" = '3d' AND "release_date" = '2008-2011'

Question: When did Riot Games release their 3D MOBA game?
SQL: SELECT "release_date" FROM online_games WHERE "type" = '3d' AND "genre" = 'moba' AND "developer_s" = 'riot games'

Question: When did Masthead Studios release their game?
SQL: SELECT "release_date" FROM online_games WHERE "developer_s" = 'masthead studios'

Question: What operating system was needed for 2D games?
SQL: SELECT "required_os" FROM online_games WHERE "type" = '2d'

Question: What type of 3D game did Valve Corporation release?
SQL: SELECT "genre" FROM online_games WHERE "type" = '3d' AND "developer_s" = 'valve corporation'

Question: What was the minimum operating system required by Stunlock Studios' game?
SQL: SELECT "required_os" FROM online_games WHERE "developer_s" = 'stunlock studios'