Half-Life 2; Episode 1; Episode 2; Half-Life: Alyx more than a smouldering scar on Episode Two's skyline and the Citadel looks like a long-finished game of girder It reads bitwise right to left, with (what numerous resources online describe as) location 1 being the least significant bit, and location 45 being the most significant (the first 5 hex digits will be 0x00001). Note in my example, location 45 shows as not discovered, which is a problem I'm having with Half-Life 2: Update actually. Also not Half-Life 2: Episode Two is the second of a series of stand-alone episodes based on HL2, the popular and acclaimed shooter epic. 4gKqq.