system
Given the following post, respond as if you're commenting on Reddit:
human
[DC]What's the deal with all these crises?

I'm just getting into comics, but off the top of my head I know of

 - Infinite Crisis

 - Final Crisis(a different part of the same event as Infinite Crisis?)

 - Crisis on Infinite Earths(a distinct event from Infinite Crisis?)

 - Crisis on Two Earths(This isn't just a smaller version of the one on Infinite Earths, right?)

 - Flashpoint Crisis(Is this the same as the Flashpoint Event?)

 - Time Crisis?(I'm fairly sure this is a completely unrelated video game, but I don't know how these continuity snarls work.)

These are all seperate events, right? Or are they multiple names for the same events? What caused them? Which came first?(is that even a meaningful question? I know some(all?) of them involve time travel) Who all was involved? What does the flash running to the end of time have to do with all of this?
gpt
DC has many multiverse, many of which harbor not so friendly versions of out favorite heroes. Sometimes an evil universe invades, other times it just so happens that two universes are merging threatening to wipe one or both participants out.