OOA meaning in General ?

The Legend of Zelda: Oracle of Seasons and The Legend of Zelda: Oracle of Ages are two action-adventure games in the Legend of Zelda series, developed by Flagship (a subsidiary of Capcom). They were released in 2001 for Nintendo's Game Boy Color handheld console and re-released on the Virtual Console for the Nintendo 3DS in 2013. The games make up the seventh and eighth installment in the Zelda series.

The player controls the protagonist Link from an overhead perspective. In Seasons, the Triforce transports Link to the land of Holodrum, where he sees Onox kidnap Din, the Oracle of Seasons. In Ages, the Triforce transports Link to Labrynna, where Veran possesses Nayru. The main plot is revealed once the player finishes both games. Link is armed with a sword and shield as well as a variety of secondary weapons and items for battling enemies and solving puzzles. The central items are the Rod of Seasons, which controls the seasons in Holodrum, and the Harp of Ages, which lets Link travel through time in Labrynna. Before he can infiltrate Onox's castle and Veran's tower, Link must collect the eight Essences of Nature and the eight Essences of Time, which are hidden in dungeons and guarded by bosses.

After experimenting with porting the original Legend of Zelda to the Game Boy Color, the Flagship team, supervised by Yoshiki Okamoto, began developing three interconnected Zelda games that could be played in any order. The complexity of this system led the team to cancel one game. Both Seasons and Ages were a critical success, and sold 3.96 million units each. Critics complimented the gameplay, colorful designs and graphic quality, but criticized the inconsistent sound quality.