| DoubleSceneSplitScreenEngine | (c) 2010 Nicolas Gramlich (c) 2011 Zynga Inc. |
| Engine | (c) 2010 Nicolas Gramlich (c) 2011 Zynga Inc. |
| FixedStepEngine | A subclass of Engine that tries to achieve a specific amount of updates per second. |
| LimitedFPSEngine | A subclass of Engine that tries to achieve a specific amount of
updates per second. |
| SingleSceneSplitScreenEngine | (c) 2010 Nicolas Gramlich (c) 2011 Zynga Inc. |