The collection supports Save States , allowing players to save their progress at any point—a major help given the series' notorious difficulty.

: Includes minor performance improvements and bug fixes to ensure smooth emulation by developer M2. Full Game List

Includes a digital "Bonus Book" with sketches, drafts, an official chronology, and exclusive interviews with veteran producers.

Some updates unlocked previously hidden ROM variants, such as the Japanese version of Contra (titled Probotector in Europe, which replaced human characters with robots). The update allowed toggling between arcade, NES, and Famicom versions directly from the menu.

, it is widely regarded as a high-quality port that captures the original gameplay feel, complete with authentic slowdowns and sprites. Contra Wiki Key Updates & New Features