Base Defense is a single/cooperative mod based on horde-style system. It's awesome, you should try it ;)

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Added | Game Name | Type
The Extended Base Defense

The Extended Base Defense

Oct 31, 2012 Full Version (12.77mb) 27 comments

New version 1650. Now I'm tired of developing Base Defense, so I decided to take a break. A lot of things I didn't realised...

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Half-Life Icon
Game
Half-Life
Developed By
PLutRUS
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Official Page
B-def.16mb.com
Release Date
Released Oct 2012
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