DS9 makes first contact with a species from the gamma quadrant.
This is an odd episode that has a reasonably good premise, but when the final reveal comes it feels a rather pointless experience to me.
There are some positives, such as some of the character exchanges between Sisko and Jake, Sisko, Dax and Kira and Odo and Quark. You get a good sense of characters loyalty to each other from the situations they are seemingly put in.
Many visuals are a good standard, particularly the cave scenes that feel quite exciting and well made. Plus the general design of the game both internally and how it physically appears within Quark's.
The Wadi are not the most inspired of alien designs, particularly supposedly coming from the far reaches of the gamma quadrant. As a first impression of what DS9 would be serving up using the wormhole concept, it is quite poor.
There are a number of annoying moments such as the crew trying to stop the game with the 'we are not amused' attitude and making futile attempts to talk to characters who do not acknowledge them. The allarmaraine nursery rhyme sequence is (briefly) almost as painful as watching Captain Kirk and Spock's humiliation at the hands of Parmen. Dr Bashir (also briefly) is again poorly characterised.
When the final reveal comes it is exactly what you thought it might (but hoped it wouldn't) be.