Steam DB Steam DB Tag Online
What you're getting:
* A basic text tutorial
* Practice mode (you can experiment with tagging a dummy NPC in different parts of the field and learn how the game works)
* Multiplayer (the basic idea is that each player has a 60-second turn to tag others, and the player with the most points at the end of the match wins. Defenders can evade taggers by going into the red parts of the field, and the taggers can use certain parts of the field to change which areas are red or green. Players that are tagged respawn, so a single defender can be tagged multiple times by the same tagger.)
Issues with the game:
Some features don't work correctly. For example, the rematch feature does not work properly yet, the tiebreaking is nonfunctional, and the Survivor game mode (an additional game mode on top of the Classic mode described above) is only partially functional.
Future of this game:
More sports might be added, such as Langdi (a hopping form of tag).