Anyone who has played only one minute of Spelunky knows that the littlest thing can derail any effort. Creator Derek Yu won’t let that happen for the PC launch of Spelunky 2.
When Spelunky 2 hits PC on September 29, it won’t include online cooperative play. That’s a concession that Yu is making in order to prevent a delay.
Source: Destructoid Spelunky 2 dodges a delay on PC by temporarily leaving online co-op behind