One or more instances of a bonus game (e.g., Class II games such as Bingo games) may be provided to players of another wagering game (e.g., a Class III game such as a slot game, a poker game, etc.). Some implementations of the invention allow players to exchange indicia of credit (e.g., money, game credits, or player loyalty points) for bonus opportunities. For example, players may be able to purchase one or more Bingo cards for Bingo bonus games. Some implementations award bonus opportunities to players based on wager levels, game results, a player's level in a player loyalty program and/or other criteria.