Ostron

Ostron is a clone of Joust.

Riding an Ostrich, you must do battle with buzzard-mounted knights. Rather
than shooting at them or fighting hand-to-hand, the combat is resolved simply
– you must be above the buzzard to defeat it, otherwise you lose one of your
five lives. There are ledges in the landscape, to increase the strategic
nature of finding a winning position. Each scene contains a set number of
knights to be vanquished – lose a life and you must restart the screen. Four
types of opposition are faced, increasing in speed and skill – Blue Bearers,
Green Chasers, Red Knaves and Dark Knights.

Ostron