Learn how to use the Alien Swarm SDK to produce a Holdout/Survival Map.
Posted by Adamw on Jul 20th, 2010
1a)Open up hammer and create a basic room. (Including a player start and appropriate lighting).
1b)Locate the "asw_holdout_mode" entity and place it in your map. (NOTE: it doesn't really matter where you put it, just place it somewhere convenient).
2a)You will see the option "Holdout Filename".
2b)These files can be found in "C:\Program Files\Steam\steamapps\common\alien swarm\swarm\resource\holdout".
2c)Open the file "holdoutwaves_default".
Here's an example of the first paragraph:
The bit in red is the name of the "asw_spawn_group" entity that needs to be placed in your map.
The bit in blue is the name of the "asw_holdout_spawner" that needs to be placed in your map.
2d)Create a text file in the Holdout folder and paste the paragraph in. Then insert the name of the text file into the "Holdout Filename" field in hammer.
3a)Make a "asw_spawn_group" using the name provided.
3b)Make a "asw_holdout_spawner" using the name provided. (Make sure it is situated near the spawn group, this is where the Aliens will spawn).
Hard to explain but i hope you understand :P.
To make more waves you just make a duplicate of the paragraph.alter the value in blue in the text file, make a duplicate of the "asw_holdout_spawner" and make sure that the values match up. Then enter the name of the next wave, (the name of the holdout spawner) ,into the "Spawner 02" field in the "asw_spawn_group" entity.