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Half-Life 2 is currently 100% off for its 20th anniversary, plus a major update
(store.steampowered.com)
Bonus: it also seems that the episodes have been rolled into the base game. Full details of the anniversary update.
What annoys you about the ladders? To this day, I find them among the easiest video game ladders to use. No stupid button prompts; just hold W. To go down one, just face it backwards and press S. Simple, genius design.
I seem to get stuck on them occasionally. Like I'm at the top or bottom but can't just walk off.
I would always look down and press W to go down and then plummet to my death, didn't know it just worked by walking backwards.
I knew about just pressing S, but I have also done this more than I care to admit.