Key features of "NHL FaceOff '99" include:

1. Authentic NHL Experience: The game offers an authentic representation of National Hockey League (NHL) gameplay, featuring real teams, players, and arenas from the 1998 NHL season. Players can choose from all 26 NHL teams at the time and compete in various game modes, including exhibition matches, playoffs, and a full season mode.

2. Realistic Gameplay: "NHL FaceOff '99" strives for realism in its gameplay mechanics, with accurate player physics, puck movement, and AI behavior. Players can perform a variety of hockey moves, including skating, passing, shooting, and checking, to outmaneuver opponents and score goals.

3. Multiplayer Modes: The game supports multiplayer gameplay, allowing two players to compete head-to-head in exhibition matches or team up to play cooperatively against AI-controlled opponents. Players can also compete in tournament-style playoffs or complete a full NHL season with their favorite teams.

4. Commentary and Presentation: "NHL FaceOff '99" features commentary from professional broadcasters, providing play-by-play commentary and analysis throughout the game. The game also includes detailed player animations, arena graphics, and crowd reactions to enhance the overall presentation and immersion.

5. Customization Options: Players can customize various aspects of their gameplay experience, including game length, difficulty level, and camera angles. Additionally, the game includes options to adjust team lineups, strategies, and player attributes to create custom matchups and simulations.

6. Legacy and Impact: "NHL FaceOff '99" was well-received by critics and fans alike upon its release, praised for its realistic gameplay, attention to detail, and immersive presentation. The game's success helped solidify the NHL FaceOff series as one of the premier ice hockey video game franchises of its time, paving the way for future installments in the series.

Overall, "NHL FaceOff '99" offers an engaging and authentic ice hockey experience for PlayStation players, capturing the excitement and intensity of NHL action on the virtual ice. With its realistic gameplay mechanics, extensive customization options, and multiplayer modes, it remains a beloved title among hockey fans and retro gaming enthusiasts.