Voidtrain achievements

Exchange 5 different items in a row only with a discount. Achievement by: Potion O'Confusion

While in afterburner mode, destroy 15 mines straight. Achievement by: isoTOPe

Die from colliding with any stone in the void. Achievement by: Sussela

Play a musical instrument with 2 Rofleemo simultaneously

Trade 10 different items at the vending machine

Get through all the arena waves without letting your HP drop below 25%

Hit at least 4 enemies at once with a single annihilation sphere

Kill a bomber bug without letting it explode itself

Kill any enemy soldier with a gas tank explosion

First, ignite, then freeze the same enemy

Clean 5 mud sources

Have 3 or more water condensers on the train