The listing, Robot Robert (Steam Key) has ended.
https://store.steampowered.com/app/1505400/Robot_Robert/
ABOUT THIS GAME
Features
High-tech Robot Robert.
Convenient operation.
Dangerous opponents.
Lasers and traps.
Alien creatures.
Shoot and destroy all enemies.
Complete levels and get achievements.
History
Year 3875, scientists discover a habitable planet and send expedition number three, consisting of one highly technological Robot Robert, a flight lasting 557.7 light-years.
With Earth's signal lost, your goal is to find traces of the first two expeditions and find out what the friendly planet is hiding beneath the surface. Your mission begins in a cave full of riddles, hostile creatures, and dangerous plants.