When comparing Garry's Mod: Murder vs Return of the Obra Dinn, the Slant community recommends Return of the Obra Dinn for most people. In the question“What are the best murder mystery video games?” Return of the Obra Dinn is ranked 9th while Garry's Mod: Murder is ranked 12th. The most important reason people chose Return of the Obra Dinn is:
Using a dot matrix art style sets the game apart in looks from just about anything made before. A throwback to classic games but rendered in a 3D modern view.
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Pros
Pro Can easily use community content
Supports community made content such as maps, which expands the gameplay.
Pro Fun with friends
You can mess around with friends as the mod supports asynchronous gameplay with multiple people. One player is the murderer while all other players have to figure out who the murderer is. This makes for a good group game to play with friends.
Pro Interesting art style
Using a dot matrix art style sets the game apart in looks from just about anything made before. A throwback to classic games but rendered in a 3D modern view.
Cons
Con No storyline
There is no story what so ever, which may not appeal to some.
Con Not released yet
While a demo is available the game is still in heavy development and no release date has yet to be set.