《求生之路2》版本众多，相互之间比较繁杂，部分玩家搞不清楚版本，本文就把版本号以及资料片、对应的引擎做一个详细的介绍。
《求生之路2》我们说的版本号就是20XX，4XXX是引擎号，一个引擎号可以有多个版本号，而能否互相联机是看版本号的，所以报了引擎号反而混乱。
| 版本号 | 对应引擎号 | 备注 |
| 2.0.0.0 ~ 2.0.0.7 | 4001 ~ 4052 | |
| 2.0.0.8 ~ 2.0.1.1 | 4079 ~ 4121v1 | |
| 2.0.1.2 ~ 2.0.2.2 | 4183 ~ 4202v4 | 启用资料片”消逝(The Passing)“ |
| 2.0.2.3 ~ 2.0.3.8 | 4202v5 ~ 4317v2 | |
| 2.0.4.0 ~ 2.0.5.1 | 4346 ~ 4388 | 启用资料片”牺牲(The Sacrifice)“ |
| 2.0.5.2 ~ | 4391 ~ | |
下面是版本号列表：
| 版本号 | 引擎号 | 备注 | 日期 |
| 1.0.1.0 | 4001 | 游戏发售，地图c1-c5 | 2009-11-17 |
| 2.0.0.0 | 4001v1 | ||
| 2.0.0.1 | 4031 | ||
| 2.0.0.2 | 4035 | ||
| 2.0.0.3 | 4035v1 | ||
| 2.0.0.4 | 4045 | ||
| 2.0.0.5 | 4045v1 | ||
| 2.0.0.6 | 4045v2 | ||
| 2.0.0.7 | 4052 | ||
| - | |||
| 2.0.0.8 | 4079 | ||
| 2.0.0.9 | 4106 | ||
| 2.0.1.0 | 4121 | ||
| 2.0.1.1 | 4121v1 | ||
| （以下为DLC消逝） | |||
| 2.0.1.2 | 4183 | 增加地图c6 | 2010-4-23 |
| 2.0.1.3 | 4183v1 | ||
| 2.0.1.4 | 4183v2 | ||
| 2.0.1.5 | 4183v3 | ||
| 2.0.1.6 | 4183v4 | ||
| 2.0.1.7 | 4195 | ||
| 2.0.1.8 | 4202 | ||
| 2.0.1.9 | 4202v1 | ||
| 2.0.2.0 | 4202v2 | ||
| 2.0.2.1 | 4202v3 | ||
| 2.0.2.2 | 4202v4 | ||
| - | |||
| 2.0.2.3 | 4202v5 | * | |
| 2.0.2.4 | 4202v6 | ||
| 2.0.2.6 | 4261 | ||
| 2.0.2.7 | 4261v1 | ||
| 2.0.2.8 | 4272 | ||
| 2.0.2.9 | 4272v1 | ||
| 2.0.3.0 | 4281 | ||
| 2.0.3.1 | 4281v1 | ||
| 2.0.3.2 | 4281v2 | ||
| 2.0.3.3 | 4281v3 | ||
| 2.0.3.4 | 4303 | ||
| 2.0.3.5 | 4310 | ||
| 2.0.3.6 | 4317 | ||
| 2.0.3.7 | 4317v1 | ||
| 2.0.3.8 | 4317v2 | ||
| （以下为DLC牺牲） | |||
| 2.0.3.9 | 4346 | 增加地图c7、c8 | 2010-10-6 |
| 2.0.4.0 | 4346v1 | ||
| 2.0.4.1 | 4346v2 | ||
| 2.0.4.2 | 4346v3 | ||
| 2.0.4.3 | 4346v4 | ||
| 2.0.4.4 | 4346v5 | ||
| 2.0.4.5 | 4346v6 | ||
| 2.0.4.6 | 4346v7 | ||
| 2.0.4.7 | 4346v8 | ||
| 2.0.4.8 | 4346v9 | ||
| 2.0.4.9 | 4346v10 | ||
| 2.0.5.0 | 4346v11 | ||
| 2.0.5.1 | 4388 | * | |
| 2.0.5.2 | 4391 | ||
| 2.0.5.3 | 4391v1 | ||
| 2.0.5.4 | 4391v2 | ||
| 2.0.5.5 | 4391v3 | ||
| 2.0.5.6 | 4448 | ||
| 2.0.5.7 | 4448v1 | ||
| 2.0.5.8 | 4448v2 | ||
| 2.0.5.9 | 4448v3 | ||
| 2.0.6.0 | 4448v4 | ||
| 2.0.6.1 | 4490 | ||
| 2.0.6.2 | 4490v1 | ||
| 2.0.6.3 | 4490v2 | 增加地图c13 | 2011-3-23 |
| 2.0.6.4 | 4490v3 | ||
| 2.0.6.5 | 4490v4 | ||
| 2.0.6.6 | 4490v5 | ||
| 2.0.6.7 | 4490v6 | ||
| 2.0.6.8 | 4490v7 | ||
| 2.0.6.9 | 4490v8 | ||
| 2.0.7.0 | 4490v9 | ||
| 2.0.7.1 | 4490v10 | ||
| 2.0.7.2 | 4490v11 | ||
| 2.0.7.3 | 4618 | ||
| 2.0.7.4 | 4618v1 | ||
| 2.0.7.5 | 4632 | 增加地图c11 | 2011-7-23 |
| 2.0.7.6 | 4632v1 | ||
| 2.0.7.7 | 4632v2 | * | |
| 2.0.7.8 | 4650 | ||
| 2.0.7.9 | 4650v1 | ||
| 2.0.8.0 | 4650v2 | ||
| 2.0.8.1 | 4657 | ||
| 2.0.8.2 | 4657v1 | 增加地图c12 | 2011-8-13 |
| 2.0.8.3 | 4657v2 | ||
| 2.0.8.4 | 4665 | ||
| 2.0.8.5 | 4665v1 | ||
| 2.0.8.6 | 4665v2 | ||
| 2.0.8.7 | 4695 | 增加地图c10 | 2011-9-17 |
| 2.0.8.8 | 4695v1 | ||
| 2.0.8.9 | 4710 | ||
| 2.0.9.0 | 4710v1 | ||
| 2.0.9.1 | 4710v2 | * 增加地图c9 | 2011-11-5 |
| 2.0.9.2 | 4710v3 | ||
| 2.0.9.3 | 4710v4 | ||
| 2.0.9.4 | 4777 | ||
| - | |||
| 2.0.9.5 | 4777v1 | ||
| 2.0.9.6 | 4777v2 | ||
| 2.0.9.7 | 4777v3 | ||
| 2.0.9.8 | 4777v4 | ||
| 2.0.9.9 | 4777v5 | ||
| 2.1.0.0 | 4777v6 | ||
| 2.1.0.1 | 4777v7 | ||
| 2.1.0.2 | 4777v8 |
