Play Half-Life with friends! Players fight computer-controlled monsters through the original Half-Life storyline or hundreds of available co-operative scenarios. Also includes a plethora of new weapons, enemies, visuals and gameplay systems. Customization features allow each map to use its own unique weapons and enemies.
One of the donation rewards from Sven Co-op, first included with version 4.0B as a secret bonus feature.
Once summoned, your Chumtoad will follow you about, attacking your enemies with a poisonous gas cloud. The cloud also obstructs enemies' vision, reducing the accuracy of their ranged attacks.