Mars 21
Cooperative 2D platformer
School | Gobelins & Cnam-Enjmin |
---|---|
Release | 2015 |
Platform | Windows, macOS, Linux, Web |
Genre | Platformer |
Mode | 2 players co-op |
Play time | 4 minutes |
Target audience | 3-11 years old |
Working period | Oct 2015 - Mar 2016 |
Team | 4 people |
Role | Game design, Gameplay programming |
Technology | Unity 5 |

Description
Mars 21 is a cooperative platform game for 2 players on PC. Player 1 controls an astronaut moving on the ground and player 2 controls a flying Martian creature. The two characters have different abilities and the players must cooperate to finish the game.


Screenshots




Context
The game was developed in 1 month as our first video game project for the Interactive Digital Experience curriculum at Gobelins (Paris). The setting of the game is loosely based on science fiction short story collection The Martian Chronicles by Ray Bradbury. The game was further polished the following year over 3 months, in parallel with the development of new projects.
Team
- Long Nguyen Huu: Game design, Level design, Gameplay / UI programming
- Ludovic Marguerie: Game design, Level design, 3D modeling, Story, Sound design
- Coralie Perot: Concept art, Character design, Story, Opening movie
- Jean-François Cœur: Graphics programming, Gameplay / UI programming
Role
Game design
- Astronaut control design
- Alien damage rules
Level design
- Setup of environment colliders
- Fine platform and hazard placement
- Checkpoint placement
- Light cues
Gameplay programming
- Astronaut character controller
- Damage, death and respawn system with checkpoints
UI programming
- UI tween animations
- UI and movie subtitles localization system
Build
- WebGL support
- Various optimizations
3D integration
- Integration of humanoid model and animations
- Damage particle effects
Localization
- English translation (from French)
Unity packages
- Rewired
- nickgravelyn’s UnityToolbag (repository has been removed)
- DOTween
- Vexe Framework
Acknowledgements
- Setting based on The Martian Chronicles by Ray Bradbury (especially The Green Morning and The Watchers)
- Electric Sparks SFX by Connum on freesound (CC-BY-NC 3.0)