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Système Tromeur d20
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This is an RPG mechanism used by Philippe Tromeur in a number of his one-page role-playing games. He developed the system in 2007 during which time the exact mechanics varied somewhat, and then used it often in 2008 in a fairly stable format.

The core system uses a short list of attributes. At character generation, players have a set number of points to distribute amongst these attributes.

Task resolution is performed by rolling a single twenty-sided die. Rolling less than or equal to the attribute is a success, and rolling more than the attribute is a failure. On top of this, rolling a natural 19 is always a failure, and rolling a natural 20 is a critical failure. Similarly, rolling a natural 2 is always a success, and rolling a natural 1 is a critical success. Further, any roll that is less than or equal to one-tenth of the attribute value (rounding up) is also a critical success.

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Date RPG Attributes Brief System Notes
Jan 2007 Les 3 royaumes Valour, Yin, Yang 15 points at char creation, fixed by race and gender; crit failure on 19 if attribute < 10
Jul 2007 Spatial 1 profession and 2 skills 30 points at character creation; crit failure if greater than 20 - attribute/10
15 Jan 2008 Enigma Body, Spirit, Codes 30 points at character creation; attribute/10 (rounded down) specialities per attribute; roll 2d20 and keep if the best if a speciality applies
15 Jan 2008 Yonaguni Spirit, Body, Ninjutsu / Sorcery 40 points at character creation (Ninjutsu / Sorcery cost double); attribute/10 (rounded down) specialities per attribute; roll 2d20 and keep if the best if a speciality applies
25 Mar 2008 Vision Q Physical, Mental, Control 30 points to spend at character creation
... ... ... ...
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RPG: Les 3 royaumes
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RPG: Enigma
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RPG: Spatial
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