ALIEN RPG vs Gamma World
Compare ALIEN RPG and Gamma World side by side. See differences in complexity, dice, genre, cost, and more.
| ALIEN RPG | Gamma World | |
|---|---|---|
| Genre | Scifi, Horror | Post-Apocalyptic, Scifi |
| Tags | Fear & Stress Mechanics, Survival, Deadly, Atmospheric, One-Shot Friendly, Gritty, Licensed IP | Superpowers, Random Character Creation, Classless, Gonzo, Comedy, Tactical, Grid-Based, Combat-Heavy, Beginner-Friendly, Deadly |
| Core Mechanic | Roll a d6 dice pool (attribute + skill). Each 6 is a success. Stress adds extra dice: better odds, but stress dice that roll 1 trigger panic. Push rolls to reroll failures but gain stress. Cinematic mode for one-shots, Campaign mode for long-form play. | Roll a d20 and add a modifier, then compare the total to a target number or one of four defenses: Armor Class, Fortitude, Reflex, or Will. Two randomly rolled character origins combine to set starting ability scores, skills, and powers instead of a chosen race and class. Alpha Mutation and Omega Tech cards drawn from a shared deck grant each character's most powerful and unpredictable abilities for the session. |
| Dice | d6 dice pool | d20 |
| Complexity | Medium | Medium |
| Accessibility | Medium | Medium |
| Runnability | High | Very High |
| License | All Rights Reserved (20th Century Studios license) | Proprietary |
| Third-Party Publishing | Not yet researched | Not yet researched |
| Cost | $$ | $ |
| Publisher | Free League Publishing | Wizards of the Coast |
| Year | 2025 | 2010 |
| Best For | Sci-fi horror campaigns and one-shots in the Alien universe, with a stress/panic system that mechanically drives tension. Supports both deadly cinematic one-shots and long-form campaign play. | Groups who want a silly, fast-paced pickup game with randomly generated mutant heroes rather than a long-term character build. |
| Highlights | Stress and panic system mechanically reinforces horror tension, two distinct play modes (Cinematic and Campaign), Evolved Edition streamlines rules and improves layout, well-supported licensed setting | Alpha Mutation and Omega Tech cards replace a fixed power list, so a character's abilities shift unpredictably as cards are drawn, used, and discarded between encounters. Rolling two random character origins instead of choosing a race and class produces unplanned combinations that push players toward improvised character concepts. A hundred-item Ancient Junk table turns ordinary scavenging into a steady stream of small, flavorful rewards between the rarer Omega Tech finds. |
| Considerations | Tightly bound to the Alien IP with limited genre flexibility, stress mechanics can feel punishing at high levels, Evolved Edition changes are modest over 1st edition | Character origins are rolled randomly from a fixed table, so a player who wants a specific concept must ask the Game Master for permission to choose origins instead. The starter box's 80 cards are the only power pool for groups without the two out-of-print expansion kits, capping how many distinct Alpha Mutations and Omega Tech items a table can draw. Running combat means tracking multiple readied and discarded card piles for each character in addition to the four defenses, conditions, and forced movement of the underlying 4th Edition engine. |