Psyvariar : Revision - Arcade Complete Playthrough #119【Longplays Land】
19Psyvariar (サイヴァリア, Saivaria) is a vertically scrolling shooter arcade game developed by Success Corporation on Taito's G-NET hardware
Player's fighter has a hit box of 1x1 pixel at the centre of fighter.
In the beginning of a game, player's fighter is AXION 001. A fighter can gain levels by buzzing of destroying enemy units or buzzing. Once the fighter gains sufficient level, it changes form and its firing patterns are altered. Fighter's level is maintained between stages, lives, and credits.
Stages
There a 6 stages in each game. After completing Stage 1 (Area 1), player can choose the area within the higher numbered stage to be completed. More difficult (and higher-scoring) areas become selectable only if the fighter's level reaches the requirement before choosing next stage.
Each time an enemy unit or bullet gets very close to player's fighter without destroying player's fighter, a "buzz" occurs. For each buzz, the fighter gains experience (indicated by meter at the top of the screen). When the fighter gains sufficient experience, its level increases, and it becomes temporarily invulnerable. During that period, fighter can inflict damages to enemy units by colliding. Player can use this short period to risk buzzing more bullets to quickly reach the next level, or to avoid particularly difficult bullet patterns. The collision area for trigger buzz to occur is a circular area surrounding fighter's hit box, covering the fighter's body.
When buzzing causes the fighter to transform, the damage to nearby enemy units increase. If a fighter is rolling, the buzz radius increases, fighter's hit box is reduced, and the buzz collision detection is only done once every 2 frames.