When Is 2.21 Coming Out Now

If you mean — that was released in 2010.

If you mean — no such version exists; the game is on 1.20+ (as of 2025). when is 2.21 coming out

If you mean — Linux kernel versions jumped from 2.6.x to 3.x, so 2.21 was never released. If you mean — that was released in 2010

The query "when is 2.21 coming out" is ambiguous without additional context, as "2.21" could refer to a software version, game update, app release, or other numbered release. or other numbered release.