Digital Integration's helicopter simulation, released as Apache in the US. This research archive follows the resources and code of the January 1998 engine, alongside the earlier releases and patches in our collection.
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A tour of the models, battlefields and discoveries behind the reconstruction, with a few favourite viewers to explore.
Four warzones, 110 missions and 42,054 waypoints, with placed scenery and model links.
1,314 model records, drawing states, textures and levels of detail.
242 IFF images, decoded and compared with the original image loader.
636 original widgets, control rectangles and original-versus-C++ frame comparisons.
Seven disc contents, four patches and a demo. File-level comparisons and source provenance.
Five isolated DOS installs, including the July 1995 playable demo, with launch shortcuts and screenshots.
The surviving source names and symbols, and the native execution checks behind the decoders.
Twenty cockpit layouts and all 76 original image pieces, with native drawing checks.
26 introductions and campaign animations, with playback and individual frame inspection.
145 extracted images, active animation sequences and original loader checks.
The recovered MANEDIT figure, 104 playable poses, and all 110 source files with channel tables.
522 sampled recordings, original playback rates, mission links and sound-bank details.
Complete character tables, original formats, and TrueType and WOFF2 representations.
Original key registrations, keyboard ramps, joystick curves and input routing.
Realistic and arcade flight traces, engine failures, fuel, hover and landing behaviour.
Original cockpit sequences, optical targeting, radar contacts and MFD controls.
Mission stages, debrief decisions, pilot recovery, promotions and save files.
Mission orders, target search, difficulty settings and tank battles through original execution.
55 definitions, motion and damage rules, guidance and countermeasure checks.
Repeatable complete-engine reference frames with working cockpits and instruments.
Fixed-point transforms, trigonometry tables and comparisons with original calculations.
Apache C++ connects the menus, planner, flight models, weapons, AI, instruments, audio, campaigns and LAN multiplayer. Apache Redux adds higher resolutions, adjustable field of view and model detail distances. Original-code comparisons cover numerical state and rendered frames, with input and game journeys checked in the running reconstruction. See the current verification status, multiplayer research and engine revision comparison. The work plan retains the research history.