There will be more data and proper atribution here (original author, steam link, original post date, etc) real soon, I promise. This is just like a technical test to see if they're coming in ok at all.
Survivor Mercs » Patch 0.9.4 – Hotfix
HOTFIX
Once you picked up a Sonic Boom powerup, it didn’t deactivate and push all enemies back for the whole run. This hotfix patch fixes that and makes the Sonic Boom powerup work as expected.
Lock, load, and loot, Commanders!