Difficult

Clone Drone in the Danger Zone is a robot voxel slice-em-up where any part of your body can be sliced off. With your mind downloaded into a robot gladiator, you must survive the sinister trials of the arena.

Lost at sea 1803 ~ The good ship Obra Dinn.

Shadow Tactics is a hardcore tactical stealth game set in Japan around the Edo period. A new Shogun seizes power over Japan and enforces nationwide peace. In his battle against conspiracy and rebellion, he recruits five specialists with extraordinary skills for assassination, sabotage and espionage.

Paint the Town Red is a chaotic first person melee combat game set in different locations and time periods. The voxel-based enemies can be punched, bashed, kicked, stabbed and sliced completely dynamically using almost anything that isn't nailed down.

Developed by id Software, and originally released in 1993 and 1994, the definitive, newly enhanced versions of DOOM + DOOM II are available as a combined product.

買う、売る、貰う、手放す いつから人間は所有権を自由に扱えると勘違いしたのか レインボーでイマモリアルなシューティング幻想！

The great exploits of the Ancient Rus in the war with the lizards. Immerse yourself in the world of Hyperborea and defeat hordes of Lizards and other unholy who encroached on holy places Ancestors. Choose a blessed hero and go save the world from the green plague.

Awaria is a short game about working in haunted maintenance tunnels.

Minimal physical puzzle with explosions

Nuclear Throne is a post-apocalyptic roguelike-like top-down shooter. Not 'the final hope of humanity' post-apocalyptic, but 'humanity is extinct and mutants and monsters now roam the world' post-apocalyptic. Can you reach the Nuclear Throne?

Desperados III is a story-driven, hardcore tactical stealth game, set in a ruthless Wild West scenario. Play smart if you want to succeed. A good plan can make the difference between survival and finding yourself at the business end of a pistol.

Superflight is an intense, easy to learn wingsuit game with an infinite number of beautiful procedurally generated maps. A great game to relax for half an hour and chase your latest highscore!