Game air tech and recovery systems explained

What air tech and recovery systems are

An air tech (also called air recovery, air ukemi, or air reset) is a defensive option available while a fighter is airborne and in a knockdown or helpless fall state. Instead of falling passively to the ground, the defender inputs a tech during a recovery window and animates a short reposition — typically with partial invincibility — before regaining full air control or landing.

Air techs mirror ground tech rolls but operate in vertical space: they change horizontal spacing relative to the attacker, alter landing position, and create a second okizeme layer while both fighters are still airborne. They are distinct from double jumps (mobility tools), air dashes (offensive movement), and anti-air reversals (attack hitboxes on the way up).

Without air tech, juggle combos become deterministic: once launched, the defender has no agency until ground knockdown. With air tech, launch routes become conditioning games — attackers must cover left, right, and neutral recovery; defenders accept punish risk on wrong reads.

Techable versus untechable air knockdowns

Not every airborne hit should allow recovery. Designers tag knockdown types:

Techable air knockdown

Opens an air tech window after hitstun ends. Used on mid-combo launcher hits, soft juggle enders, and wall-bounce resets where the attacker still needs to cover escape routes. Tech window usually starts 4–12 frames after hitstun and closes before the victim would land without input.

Untechable air knockdown (hard air KD)

No air tech allowed; victim falls to ground knockdown. Reserved for combo enders that should guarantee oki, super finishers, and moves flagged as hard knockdown in the air. Mixing techable and untechable enders within the same character kit is how you keep juggles threatening without making every route escapable.

Air reset without knockdown

Some games reset both fighters to neutral spacing mid-air without a knockdown state (Marvel-style air reset). Tech input may still apply: defender chooses recovery direction before regaining movement. Document whether resets consume the one-tech-per-airborne-segment rule.

Publish a per-move table: air_kd_type (none / soft / hard), techable (bool), untechable_until_land (bool). Tournament players cannot lab juggles without it.

Directional air recovery variants

Most fighters expose three air tech directions plus a passive fall default:

Backward air tech

Primary escape: pushes the defender away from the attacker's forward momentum. Strong against opponents who jump forward for air-to-air follow-ups; loses to fast downward air normals that cover backward drift.

Forward air tech

Cross-up gamble: defender recovers through or past the attacker, switching sides mid-air. Beats opponents holding back during juggle carry; loses to early juggle hits with wide horizontal coverage. Should have shorter i-frames than backward tech in most designs.

Neutral / downward air tech

Minimal horizontal movement; fastest total recovery or longest i-frames. Beats opponents who assume backward escape; still loses to tight air oki layers that cover the landing point below.

Example frame budget (Harbor Brawl final tuning):

Pair published values with frame data sheets. Air tech is useless for players if i-frame ranges are hidden.

Airborne state machine integration

Air tech plugs into the juggle and knockdown pipeline:

1. Airborne hitstun — victim cannot act; gravity may be altered during juggle.
2. Tech window opens — after hitstun if move is techable; input buffer typically 4–8 frames.
3. Tech branch — directional input + tech button starts recovery animation; passive fall timer pauses.
4. Recovery complete — victim regains air control or enters landing state; attacker's juggle advantage recalculates from new spacing.
5. Ground transition — if victim lands, ground knockdown rules apply (tech roll, wake-up, etc.).

Design parameters per juggle segment:

• One tech per airborne sequence — prevents infinite air-reset loops; reset on ground contact or after untechable ender.
• Tech during wall bounce — decide if wall splat cancels tech window or opens a shorter secondary window.
• Gravity scaling — faster fall after tech may help attackers time air oki; slower fall rewards backward escape.
• Juggle count interaction — some games disable air tech after N hits in the same combo (see juggle limit systems).

Air okizeme coverage

Attackers build air oki layers that cover multiple tech branches while still airborne or at the landing frame. Document setups as matrices:

Air oki should not replace ground oki — it extends the juggle conditioning game. If every launcher ends untechable, air tech is dead content. If every hit is techable, juggles never reward commitment.

Case study: Harbor Brawl air-tech refactor

Before the patch, Harbor Brawl's juggle system had three problems:

• All air hits used the same knockdown type — no untechable enders.
• Defenders mashed tech on landing (ground) instead of in the air — launchers covered both with the same timing.
• Air-to-air counter hits had no recovery layer — one anti-air meant full combo with zero escape.

The refactor shipped:

• Directional air tech with the frame table above and training-mode overlay.
• Per-move techable flags: light launcher techable, heavy ender and super routes untechable.
• One-tech-per-airborne-segment rule with HUD icon when tech is spent.
• Air oki tutorial strings showing backward-tech escape versus meaty landing.

Outcomes: launch-character win rate fell from 58% to 51%; average juggle length rose 0.4 hits (riskier routes); player surveys cited “comeback chance in the air” as the top positive change.

Technique decision table

Common pitfalls

• Every air hit techable. Juggles never stick; launch characters feel weak despite long combos.
• No untechable enders. Attackers cannot secure guaranteed knockdown payoff after conditioning.
• Air tech i-frames cover entire fall. Juggle follow-ups whiff forever; system is a free escape button.
• Forward air tech crosses through floor. Defenders phase below stage or clip through attackers.
• Tech window opens during hitstun. Mashers escape mid-combo without reading the attacker.
• Unlimited air techs per juggle. Infinite reset loops until timeout; matches stall.
• Hidden techable flags. Players cannot learn which routes end in hard KD without datamining.
• Rollback desync on air position. Tech drift must be deterministic from input + frame, not client prediction alone.

Production checklist

• Define air knockdown taxonomy: soft (techable) vs hard (untechable).
• Author per-move techable and air_kd_type in frame data.
• Specify tech window start/end relative to hitstun end.
• Publish i-frame ranges for backward, forward, and neutral air tech.
• Enforce one-tech-per-airborne-segment with HUD feedback.
• Integrate wall bounce and air reset rules with tech availability.
• Build air oki coverage matrix for each launch character.
• Add training mode air-tech overlay with drift visualization.
• Test juggle routes: can attacker cover all three tech directions?
• Validate tech drift under rollback netcode simulation.
• Document ground transition: does air tech affect landing knockdown type?
• Publish air tech table alongside ground tech roll data.

Key takeaways

• Air tech gives defenders agency during juggles without shortening combo spectacle.
• Techable versus untechable flags on specific moves balance escape and ender payoff.
• Directional recovery turns air oki into a spacing read, not a solved timing puzzle.
• One-tech-per-segment and published i-frames prevent mash escape and hidden knowledge.
• Harbor Brawl cut launch-character dominance by 7 points while slightly increasing juggle length.

Related reading

• Game tech roll systems explained — ground recovery parallel to air tech
• Game juggle and launch combo systems explained — the routes air tech interrupts
• Game hard and soft knockdown systems explained — knockdown types that gate tech
• Game anti-air systems explained — the launch entry that starts juggle sequences