• Running speed is 48 units per in-game frame.
• Jumping creates on average 5/3 frames of slowdown.
• Landing creates on average 2/3 frames of slowdown.
• Total average slowdown for single jump is 7/3 frames (taking jumping and landing into account).
• In-game frames seem to last 2 VGA frames (in absence of lag).
• Initial jump vertical velocity is 82 units per frame (kept for few frames).
• Terminal falling velocity is 140 units per in-game frame.
• Stairs are climbed up/down at 32 units per in-game frame.
• Initial HP is 8 on easy, 4 on normal/hard.
• Max. HP is 8 on easy, 4 on normal and 2 on hard (yes, initial HP is above max. on hard)

Fastest way to climb on ladders is to jump to one, holding jump and up. When Snake touches the ladder, he will immediately jump. Then 3 frames before he clings to the ladder, briefly release jump for two frames and then press it again (so if he clings on frame 1234, release jump when frame counter is 1231 and press it again when frame counter is 1233). Normally this clinging occurs every 22 frames.

This method can climb stairs at an average speed of about 65 units per frame.

When entering level, if you are below initial HP, save and load the game. This restores HP to initial (most useful on hard level as this trick is the only known way to regain lost health^[1]).

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[1] On hard, medikits reset your health to 2HP.

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See also

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GameResources/DOS/BioMenace last edited by Ilari on 2011-07-24 07:37:45
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