“Rising water is a single player, standalone level for Half-Life 2: Episode 2. On his way to a rebel outpost with Alyx, Gordon gets into some car trouble. With split second reaction time, Alyx is able to jump out of the buggy before Gordon accidently drives it into an Antlion cave.
After recovering from the fall, Gordon realizes the cave is not only full of Antlions, but the water in it is rising fast from the rain, and it is full of leeches! Gordon must climb, run, jump and punt Antlions with the gravity gun to get to the top of the cave before it is too late.”