The answer....NO!!
If the game is fairly short then yeah the reviewer should finish it if they don't have anything else to do; but if a short game fails to hold their attention then it's not a good sign. They should play enough to experience the graphics, the interface and at least comment on the gist of the plot without giving away too much because people complain about spoilers.
"Oh Yahtzee doesn't even finish the games he reviews!" Yeah well he unlike you has a life to attend to and those things are a fucking massive time sink.
If the game is fairly short then yeah the reviewer should finish it if they don't have anything else to do; but if a short game fails to hold their attention then it's not a good sign. They should play enough to experience the graphics, the interface and at least comment on the gist of the plot without giving away too much because people complain about spoilers.
"Oh Yahtzee doesn't even finish the games he reviews!" Yeah well he unlike you has a life to attend to and those things are a fucking massive time sink.