These environment variables will change the behavior of the app:

• DEVTOOLS=1 — start with Chromium Devtools open — useful when something goes wrong before the F12 binding becomes available.
• MARCO_POLO=1 — dumps all redux events being dispatched throughout the app. We attempt to filter that (see private field in payloads) but **please pay extra care to any logs you post publicly** to make sure you're not leaking your own credentials.
• LET_ME_IN=1 — dump itch.io API calls to console
• DIEGO_IS_ASLEEP=1 - forbid [our diagnostics tool][diego] from running commands like uname, lspci, sw_vers, wmic, and ver on your system and writing the results to a file on your local disk.
• CAST_NO_SHADOW=1 — opens devtools for the purchase window
• NO_TEACHING=1 — disable featured collections (useful to debug data transfer between node and browser side)
• TRUST_ME_IM_AN_ENGINEER=1 - never show Buy now instead of Install. Obviously, the backend has to agree with you.
• REMEMBER_ME_WHEN_IM_GONE=1 - don't wipe downloads when uninstalling. Useful for debugging install/uninstall routines.
• THE_DEPTHS_OF_THE_SOUL=1 - print debug info when extracting certain archives
• IMMEDIATE_NOSE_DIVE=1 - open dev tools before launching html games
• UP_TO_SCRATCH=1 - force update checks, even in development environment
• MY_BUTLER_IS_MY_FRIEND=1 - show butler debug messages
• MY_BUTLER_IS_MY_ENEMY=1 - show all of butler's output before parsing
• PROFILE_REQUIRE=1 - profile how much time it takes to require modules
• ITCH_IGNORE_CERTIFICATE_ERRORS=1 - ignore certificate errors - USE WITH CARE only with debugging proxies that do SSL proxying
• ITCH_EMULATE_OFFLINE=1 - simulate a network outage