Complex sentence: Characters can continue to level up through activities within the Peristylium while the PSP is in sleep mode while the cartridge was plugged in and the PSP was charged, and an ad-hoc multiplayer option is included where players can assist others within missions.
Split into simpler sentences: Characters can continue to level up through activities within the Peristylium while the PSP is in sleep mode, the cartridge was plugged in and the PSP is charging. An ad-hoc multiplayer option is included where players can assist others within missions.