Guild Wars 2

With 30 points into marksmanship and traited into Remorseless, Opening Strike only has 100% crit chance if the player is out of combat at the time of hit. If the player is in combat and stealths, thereby regaining Opening Strike, the next hit does not always crit.

Edit: I wanted to add that I’ve only tested this in PvP so far.

I can confirm the lack of a guaranteed crit while in combat for PvE and WvW – will have a go to test it with regards to being out of combat. Also, same goes for vulnerability applied by Opening Strikes when regained with stealth via Remorseless – as in, it doesn’t get applied.