Some games make use of playtesting with only part of their content, leaving other important sections unexposed to the public. was tested in this manner; its playtest only included the multiplayer portion of the game, while the single-player campaign was not revealed. Heart of the Swarm is also an example of a playtest where average players are not being considered for entry; the initial wave of testers are only being selected from the ranks of professional SCII gamers and from the media.