18 Free Cross-Platform Controller Testing Resources (PC, Steam Deck, Console-Like Pads) (2026 Edition)

Fest metadata lane—`controller_base/` VDF, library regen, and upload gates; this list owns installed pad matrix + glyph readability.
Pair both before October lock

One-evening pipeline—glyph_table_v1.json + Input System paths; test on installed fest build, not Game view.
Pro tip: screenshot prompts at 1280×800

Glyph listicle—autumn 2026 refresh anchors for elite/Series 2 and mixed KB+pad UI at handheld resolution.
Run after menu FPS cap holds

Troubleshooting—wrong A/B/X/Y on fest demo; binding paths + Steam Input activation order.
Use when: prompts lie on hardware

Cert-blocker lane—PNG glyph API migration when reviewers see generic Xbox art on OLED.
Best for: 1280×800 proof sessions

Official glyph emulation—dynamic prompts readable at 1280×800; pairs Unity tutorial rows.
Start here: mixed KB + gamepad UI

Controller config contract—action sets, default layouts, and why fest demo depots ship controller_base/ beside the binary.
Critical for: October upload rejections

Handheld cert expectations—glyph + input stack on installed builds; distinct from menu-idle battery smoke.
Use for: autumn 2026 retest language

Compat matrix sibling—Proton, menu FPS, MangoHud; run after pad matrix passes on same installed build.
June 2026 refresh

Upload rejection lane—STEAM_INPUT_DEFAULT_CONFIG_MISSING on fest branch; complements pad smoke here.
Use for: metadata bar red

Unity 6 binding reference—control schemes and device strings for the same Input Action asset on Windows and Deck.
Regression guard: no editor-only overrides

Godot 4.x pad API—dead zones and device names; export template must match installed Deck QA image.
Best for: non-Unity fest demos

HID mapping database—generic pads that bypass Steam Input still need consistent SDL strings.
Pro tip: diff bundled gamecontrollerdb.txt each milestone

Browser pad probe—axes and buttons for itch HTML5 slices; not a substitute for installed Steam build smoke.
Use for: web SKU only

Web platform reference—connection lifecycle for HTML5 demos; pair with WASM refocus help when tab returns.
Best for: browser-only QA

Accessibility lane—readable prompts, touch targets, and XR flows when fest UI mixes pad + KB hints.
Pair with: glyph rows above

Promotion gate—add deck_glyph_smoke_pass beside BUILD_RECEIPT before fest branch promotion.
Pro tip: installed Steam build only

Distribution spine—fest visibility, depot promotion, playtest isolation—when pad matrix passes but upload sequencing fails.
Use for: broader Steamworks context