Program compatibility

This page describes defects in homebrew games. For defects in games prior to 1996, see Game bugs.

Many older programs that are passed off as NES programs were tested exclusively with older, less accurate emulators, and do not work on a Nintendo Entertainment System.

Compatible programs

See also: Projects

• BoxBoy
• Hot Seat Harry
• Munchie Attack
• Years Behind (PAL only!)

As the PowerPak became more widespread, it became easier for programmers to test a daily build on an NES. Games developed in the PowerPak era include

• Everything in Action 53, including Concentration Room, LAN Master, Lawn Mower, NES15, Pogo Cats, Thwaite, ZapPing, and Zooming Secretary
• Battle Kid series

Almost compatible programs

Title	Problem Description	Screenshots
Final Fantasy II (English translation, Neo Demiforce)	Version 1.02 and 1.03 — graphic glitches during intro, no text during prologue (blue screen without text). Caused by incorrect setting of nametables in $2000, misuse of $2005, and reading of $2002 to detect VBLANK. [1]

Incompatible programs

• Dikki Painguin in: TKO for the Third Reich
• Mouser
• RTC Demo
• Sack of Flour, Heart of gold