shooter video game developed published ultimate play game released spectrum later released game instalment series game released company later known rare game follows rebuild rocket order explore different planets whilst simultaneously defending aliens included rare games compilation rare replay game later spawned sequels remake released service game written graphics designed spectrum games available rom format use interface allowing loading game normal method cassette loading took minutes game met critical acclaim release reviewers praising game presentation later won game year title golden awards gameplay game world presented horizontal consists platforms manoeuvre assemble rocket scattered map fill fuel taking planet procedure broadly repeated addition player defend planet aliens bonus points collect valuable resources occasionally fall level rocket stays assembled requires levels rocket giving player extra life replacement built new model new design higher number written gameplay remains unchanged enemies change forms level cycling levels alien different pattern movement means dealt different manner development release founded brothers tim tim wife carol headquarters trading ultimate play game began producing multiple video games spectrum early 1980s company known reluctance reveal details operations upcoming projects little known development process work separate teams team work development whilst concentrate aspects sound graphics whilst developing brothers closely studied emerging japanese video gaming market started practice developing games upcoming console later predicting spectrum limited lifespan spectrum games available rom format use interface allowing loading game normal method cassette loading took minutes game common technique placing sprites image sprites atop created overlapped colours versions game game able run version spectrum game sold total units spectrum generated million revenue ultimate play game enabled brothers gain early video gaming market game release parodied long running crash comic strip named strip designed lasted july october gained popular reception readers develop comic photographs processed manually photo mechanical tone transferred paper later fully late 1980s reception game critically acclaimed release crash praised graphics presentation citing highest standard added difficult find real faults game similarly praised graphics stating presentation superb gameplay considered addictive retrospective review eurogamer noted colourful graphics sound effects advanced time truly experience simple gameplay praised game replay value stating piece software game number spectrum sales chart published spectrum version voted number games time voted 14th best game time readers article scheduled special tribute issue game won title game year golden awards legacy popularity spawned sequels hunt golden released spectrum disappointing sales original nes version version commodore finished released release included games developed rare game playable unlocked play laboratory obtaining beating high score rewards player necessary beat game game retained april virtual console release despite technically owned microsoft enhanced remake entitled released march microsoft press conference unveiled compilation title rare replay selection thirty games rare lifetime game library including sequels remake
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