Each game contains their own classic mode with four stages. Each stage also has four levels that bring swarms of enemies with increasing difficulty.
Each game also has an endless mode that can be unlocked- allowing the player to see how long they can survive against an array of enemies.
There are also sixty-four achievements to unlock!
Game 1:

Game 2:

Game 3:

Game 4:

Together they form The Residuals of Null, a 1-Bit Revival game. This game pursues the black and white aesthetic that 1-bit graphics exude. It reflects the binary nature- the positive and negative, good and evil, etc. Is there more to it than that? Have fun deciding!
Instruction Manual:
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The player may save once per stage. Defend yourself against swarms of enemies!
Default keyboard controls:
Arrow keys
X primary
Z secondary
F10 toggles music track
F11 toggles fullscreen / windowed
Esc to pause / open menu
Game controller:
D-pad or left analog stick
A or Y primary
B or X secondary
Left shoulder button toggles music track
Back/view toggles fullscreen / windowed
Start/menu button to pause / open menu
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Minimum:
- OS *: Windows 7, Windows 8, Windows 8.1, Windows 10 or later
- Processor: An Intel Pentium 4 processor or later that's SSE2 capable
- Memory: 2048 MB RAM
- Storage: 165 MB available space
【Windows】: 〇【Mac】: ×【Linux】: 〇