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A decently popular game is now free again. Looks half decent.
In SPHAZE, you will manipulate impossible mazes and guide mysterious robots through stunningly beautiful worlds.
SPHAZE is a relaxing exploration through fantasy and sci-fi worlds. Guide the mysterious robots through different areas, solving arcade puzzles, challenging your reflex, and helping the energetic RoBeep.
Lil robot in the pic looks like Wheatley from Portal 2.