Breakdown of shourijouken o kakuninsuru.

Questions & Answers about shourijouken o kakuninsuru.
を marks the direct object of the verb.
Here, the thing being checked/confirmed is 勝利条件, so 勝利条件を確認する means that 勝利条件 is what gets confirmed.
- 勝利条件 = the victory conditions / win conditions
- を = direct object marker
- 確認する = to check / confirm
So the structure is basically:
[object] を [verb]
確認する is the dictionary form (plain form) of the verb.
This form is commonly used in:
- headings
- instructions
- labels
- game menus
- written notes
- casual/plain style
So in a game, guide, or objective list, 勝利条件を確認する。 can sound like a neutral instruction such as Check the victory conditions.
If you wanted a more polite sentence, you could say:
勝利条件を確認します。
If you wanted a more polite request/command:
勝利条件を確認してください。