| The One Roll Engine (ORE) was designed by Greg Stolze and popularized by the GODLIKE, WILD TALENTS, REIGN, and NEMESIS rule sets. In the system, all actions are decided by a single roll of the dice, rather than separate rolls for initiative, success, and damage. This system allows for great flexibility and speed of play. | |
| Provided are some links to ORE rules sites, modifications to rules, and guides on using ORE to simulate Colonial Marines fighting Aliens. | |
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| House Rules | |
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