ResidualPlaybeta Open the radar

Zup! S

Quiet River · 2018 · $1.99 · Casual · deal grade C

Measured on 2026-09-29 10:42 UTC, 6 days ago. The whole catalog is re-measured daily; a game that just launched can move fast between passes.

  • Estimated net residual revenue: $1.0k to $1.5k per month
  • Opportunity: $1.2k per month at x1.00 dormancy
  • Estimated lifetime owners: 759.0k
  • 97% positive across 16217 reviews · 117.0 reviews/month

Why it's flagged

  • Developer active, last post 8 months ago
  • Studio active elsewhere (24 titles tracked), so this one may welcome a partner
  • Last discounted 1 months ago, 6 sales in the last 12 months
  • Proven demand elasticity: x1.3 review velocity during past deep sales

Analyst notes (AI-assisted)

Note written 2026-08-25; the live figures above take precedence over any numbers in it.

A casual puzzle game with 800 customizable achievements, primarily purchased as a low-friction profile decoration and achievement showcase tool.

Zup! S generates solid residuals each month with minimal ongoing overhead, driven by achievement hunters and profile customizers rather than traditional gameplay appeal. The case is modest but real: the title has maintained positive sentiment (97% recent), lightweight developer engagement, and a durable acquisition cost well below $2. However, the value proposition is entirely contingent on Steam's achievement ecosystem and profile display mechanics, making it a niche hold rather than a revival candidate. Most realistic play: watch.

  • Risk: Revenue depends almost entirely on Steam's willingness to expose and highlight achievement badges and custom lettering on player profiles; any design change to the profile system could eliminate the primary purchase driver.
  • Risk: No developer communication in nearly 7 months and no recent gameplay updates suggest the title is in long-term maintenance mode; technical debt or compatibility issues could emerge without active support.
  • Risk: Community motivation is extrinsic (profile cosmetics) rather than intrinsic (engaging game design), limiting word-of-mouth growth and susceptibility to seasonal sales cycles.

This case as Markdown · Estimates carry ±30-50% error per title.