An Ace Game is the final, deciding game played during a Proleague match. For instance, in usual regular season Bo5 play, it would be Game 5 or 5th set. Teams are allowed to send out anyone on their active roster, including players who have played earlier in one of the first four games. Players chosen are usually the team’s best player, but can also include a map specialist, a player with a specific/unique build, or a sniper. An example of a map specialist is HoeJJa on the map Destination, where he often takes advantage of the mineral patches blocking the second entrance by using Burrow with his Zerglings or Lurkers to sneak inside a Protoss Base.
The final games of Winners League (7th sets) usually not treated as Ace games, — KeSPA also does not charge for wins in these games bonus points in the KeSPA Ranking). Only the Ace games of regular season (Rounds 1–2 and 4–5) recorded in the season statistics.
Shinhan Bank Proleague 08–09 Season Ace Game Statistics