Here is the full list of all 7 Cosmic Trip achievements.
Create your first bot.
Collect crystals during the tutorial.
Collect at least 100 crystals and 50 ectoplasm without damaging any enemies on hard or hyper in wave mode.
Don't build any bots until wave 10, then build bots until you cannot build anymore on hard or hyper in wave mode!
Kill an enemy by throwing a frisbee through a teleporter and hitting it on the other side.
Don't let any crystal or battery touch the ground until wave 15 on hard or hyper mode in wave mode.
Throw a battery through a teleporter and have it land in a battery slot.