Since the tag length limit was increased to 35 characters, I suggest renaming counter-strike-go into counter-strike-global-offensive (31 characters), as it is no longer too long, keeping the old tag as a synonym.
While we're fixing the tag for Counter-Strike: Global Offensive, we should also cleanup the other Counter Strike tags.
- counter-strike-cz → counter-strike-condition-zero (29)
- counter-strike-go → counter-strike-global-offensive (31)
- csgo-overwatch → counter-strike-go-overwatch (27)
The Counter-Strike: Global Offensive Overwatch tag would still need to be abbreviated, as counter-strike-global-offensive-overwatch (41) would be a bit too long.
Side note: I'm surprised the overwatch tag wasn't synonimized with counter-strike-overwatch (24)