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Exploring an unknown underwater facility, in a secret mission called 404 Mission, your orders aboard the Angelizer submarine(Project 404), is collect the 404 Cards that contain traces of an unknown lost civilization for further study within 10 dangerous missions. Oxygen resources are scarce in the facility depths, meaning your time in each mission is limited.

404 Mission game is based on a procedural dungeon roguelike that increases the replayability.

- The game ends if the time expires
- If the play impact a mine, the player dies and the game is over

- Arrow keys or ASDW to move the player submarine
- When HyperEngine is ready, can be activated with the space key allowing the player to move faster.
- key f enters in full-screen mode, and key ESC exits the fullscreen mode.

Categories: desktop

Feedback from the experts

Björn Ritzl: Cool idea! Although I would not have guessed that the story took place in an underwater facility based on the color scheme. Perhaps use more dark blue and green? I like the little bleep as the oxygen depleted. Perhaps the pitch could change as the oxygen is getting closer to zero to add more sense of urgency? I forgot about the HyperEngine and played the first five levels without it. Perhaps a stronger visual cue (or sound) to notify the player that it is available?