:D

The game [url=http://en.wikipedia.org/wiki/D_(video_game)]D[/url] has a real-time limit of 2 hours, otherwise, you get a Game Over screen.

I heard that Far Cry 4 has an easter egg where you can beat the game in like 20 minutes ^^

Discussion in a related thread about game length reminded me that this one still exists.

Another game to add the list, developed by the maker of The Moon Sliver and a fellow GOG forum regular:

The Music Machine (itch.io link with DRM-free version + Steam key)

It clocks in at about a 2 hr. playthrough experience.

Thanks, added to the list!

Saturday Morning RPG :) You could actually complete all four chapters in less than One hour.....and that includes messing around.

Kind of surprised I don't have that on the list, since I own it and have played it. Thanks! :D

Chronology only takes 2 hours to play through!

Wow, really? Another one I need to install then. Thanks, will get it on the list!

Postal: Classic and Uncut can be completed within 4-5 hours. At least, that's how long it took me.

Thanks kitty, onto the list it goes!

By the way, now that Deadnaut has been released here, you might want to edit its entry with GOG's link, instead.

Good catch, I'll do that. I'll get it onto the GOGmix as well.

GOG game to recommend:

D4: Dark Dreams Don't Die (~3-4 hours playthrough)

It's an episodic release, but if it doesn't do well commercially we might not see further seasons. What's there though in season one is really great and even if nothing else comes of it I still highly recommend experiencing the game for its refreshingly unique mechanics and writing.

I also think it's a great game to support because it is one of the few high-profile Japanese indie games to come out with a day one GOG / DRM-free release -- if J-companies can be shown that DRM-free PC games are a commercially viable way to release games it could do a lot to help shift the way the Japanese gaming industry thinks about consoles/PC's & DRM.

Thanks for the info. I'm generally not including episodic games however, unless the final complete run is under the one-day limit. Otherwise one could argue that games broken up in Acts or similar within a single release could count too.