GUNGUNGUN is a frantic and fast-paced 2D arena shooter with an eye for details. Earn a high score and increase the bounty on your head while fighting on a runaway train crawling with enemies.

Features:
- Co-op Mode: Play alone or with a friend
- 8 Unique guns that mimic their real life counter-parts
- 4 Unique enemies and 2 variants
- Dynamic gun & physics mechanics
- Meticulously designed gun sounds
- Nine arena layouts
- Time of day background changes
- Detailed lifetime stat tracking
- Lifetime highest scores tracking
- Unlockable cosmetic customization options
- Bonus Arcade-Style Unlockables

More details on the official game page of GUNGUNGUN ...