Secondary Objectives are found in the story mode missions. There are two different categories containing goals in one of them or both, main objectives and the secondary objectives. Secondary objectives are found in all missions of all the games of the TimeSplitters series. Despite being in many missions of the game, the secondary objectives do not affect anything if they have not been completed, it only affects what the missing objectives were to complete. Incompletion of secondary objectives in custom missions of TimeSplitters 2 and TimeSplitters Future Perfect may affect something or they may not. The mission may be more difficult depending on the logic that the creator put into it. In TimeSplitters Future Perfect, the secondary objectives can also affect the trophy that rewards the player according to their performance.
- In TimeSplitters Future Perfect, only 2 missions have secondary objectives.
- In TimeSplitters Future Perfect, the mission You Genius, U-Genix has secondary objectives that if you fail, the mission ends with a game over.