Certain missions will indicate a specific game. Example: Hold'em, Omaha, Spin & Gold, Bounty Hunters tournament, Daily Guarantee tournament, AoF Hold'em, etc.
The game indicated in the mission means that the mission can only be completed by playing those specific games.
Hold'em specifically corresponds to Hold'em cash games only. It does not include Hold'em variants such as AoF, Rush & Cash and Spin & Gold.
Bounty Hunters tournaments specifically corresponds to tournaments under the Bounty Hunters category and does not include Featured Events.