數位遊戲中玩家的技能能否與遊戲中挑戰的困難度相匹配，對於玩家的愉悅感與遊戲的遊戲性影響相當大。因而於遊戲中經常會提供一些輔助機制，以提升玩家在遊戲中的技能，並增進遊戲的愉悅性。目前有關遊戲輔助機制的設計，有的是提供不同難度的關卡供玩家選擇，有的是動態調整遊戲本身的難度，前者常常依然無法符合各種不同技能程度玩家的需求，而後者容易造成玩家對於遊戲挑戰性認知上的錯亂。本研究除了整理目前遊戲輔助機制的設計方法外，以射擊遊戲為例，提出一個輔助機制設計方法。此方法讓玩家在闖關失敗後，給予玩家提升技能的輔助。經由實驗結果顯示，此輔助機制，確實能幫助遊戲技巧能力不足的玩家達到與遊戲挑戰性平衡的效果，並進而改善遊戲的愉悅性。

How to match player's skills and game challenges plays an important role in digital game design. Many games have imbedded some mechanisms to assist players to enhance their skills and to improve the game playfulness. However, current assisted mechanisms either provide the selection of level difficulties before playing the game, or dynamically adjust the game difficulty while playing. For the former approach, the simplest level is still too difficult for some players. For the latter one, it will let players confuse about the game challenges. This study will analyze these assisted mechanisms and propose a design method. This method will provide the assisted mechanism to players if they can't overcome the game challenges. By using the shooting game as an illustration, It was shown that the proposed method can effectively match the player's skills and game challenges. The game playfulness and enjoyment can be effectively improved by using the proposed assisted mechanism.