Question: What game  is the sixth (and final) release in the "GIPF" project of six abstract strategy games, Niagara or PÜNCT?

Context paragraphs:
Abstract strategy game: An abstract strategy game is a strategy game that does not rely on a "theme".  Traditional abstract strategy games will conform to the strictest definition of: a gameboard, card, or tile game in which there is no hidden information, no non-deterministic elements (such as shuffled cards or dice rolls), and (usually) two players or teams taking a finite number of alternating turns.

PÜNCT: PÜNCT is a two-player strategy board game.  It is the sixth (and final) release in the "GIPF" project of six abstract strategy games, although it is considered the fifth game in the project.  It was released in 2005.  "PÜNCT" won the "Games Magazine" Best Abstract Strategy game for 2007.

GIPF project: The "GIPF" Project is an award-winning series of seven abstract strategy games by designer Kris Burm.

Niagara (board game): Niagara is a German-style board game designed by Thomas Liesching and published in 2004 by Zoch Verlag and Rio Grande Games.

ZÈRTZ: ZÈRTZ is the third game in the "GIPF" Project of six abstract strategy games.  The game features a shrinking board and an object that promotes sacrifice combinations.  Since neither player owns on-board pieces, maintaining the initiative is of fundamental importance.

A Gamut of Games: A Gamut of Games is an innovative book of games written by Sid Sackson and first published in 1969.  It contains rules for a large number of paper and pencil, card, and board games.  Many of the games in the book had never before been published.  It is considered by many to be an essential text for anyone interested in abstract strategy games, and a number of the rules were later expanded into full-fledged published board games.

TAMSK: TAMSK is the second board game in the "GIPF" Project of six abstract strategy games, and was published in 1998.  Players move sand hourglass timers and drop plastic rings around spaces on a hexagonal board in an attempt to limit their opponent's moves.  Each player starts the game with 32 rings, and the player with the fewest remaining rings at the end of the game is the winner.  The game is unique among the "GIPF" Project games in having time as a central game component, and the manner in which time is used is possibly unique among board games in general.

YINSH: YINSH is an abstract strategy board game by game designer Kris Burm.  It is the fifth game to be released in the "GIPF" Project.  At the time of its release in 2003, Burm stated that he intended it to be considered as the sixth and last game of the project, and that the game which he had not yet released, "PÜNCT", would be logically the fifth game .  However, an entry in his blog  on 19 June 2005 suggests that he is reconsidering this.

Leopard hunt game: Leopard hunt games or simply leopard games are a group of abstract strategy games of Southeast Asian origin, similar in spirit to European fox games, although they are believed to have arisen independently.  The games are usually played on a triangular board with three horizontal parallel lines (including the triangle's base) intersecting the other two sides of the triangle and a vertical bisector.  Though a number of variants exist, the basic principle of the game sees one player with a single piece (the hunter) and the other playing six or seven pieces (the hunted).  Players move pieces in turn along the board's lines.  The objective for the hunter is to capture the opponents pieces by "jumping" over them as in checkers while the hunted seeks to corner the hunter so that it has no possible move.  Regional variants include

GIPF (game): GIPF is an abstract strategy board game by Kris Burm, the first of six games in his series of games called the "GIPF" Project.

Supporting paragraphs: Niagara (board game) PÜNCT
Answer: PÜNCT